Answer:
B
Explanation:
Answer: B. Larva
Explanation: I took the test
Two scientists in British Columbia are counting trout spawning grounds (called redds) along 5 km of a stream. The presence of
milky-colored fish spawn indicates a redd. The scientists walk together, surveying the same areas. What is the most likely reason
for them to count different numbers of redds?
The most likely reason for the scientists to count different numbers of redd is the observer’s efficiency.
Explanation:
In a field survey based on visual counting for visual stock assessment, the scientists may count a different number of redds each time in the same area due to the observer’s or the scientist’s efficiency.
The same place may first appear as redd and then later may not and accordingly the scientist's count also varies.
This error happens due observer’s inexperience in surveying, misidentification of redd species, changes or variations each time in the redd habitat, survey life, characteristics, spawning shifts etc., and poor temporal and spatial coverage.
Answer:
A) Some places look as if they might or might not be redds, and different scientists identify them differently.
1) The goal of scientific experimentation is to increase what we know about how the natural world operates. If a hypothesis is
tested repeatedly by a wide variety of experimental approaches in many scientific investigations and cannot be proved false,
then the hypothesis could be called a
A conclusion,
E fact.
. rule.
D. theory.
2) In the 1600s, advances in microscopy led to the development of cell theory. Which of the following statements is part of the
cell theory?
A
All(cells require water and oxygen to survive.
Alldiving things are made of one or more cells.
All cells have organelles with specialized functions.
All living things rely on several different types of cells.
Il living things require which of the following?
Answer:
1. A
2. All( Cells require water and oxygen to survive
All living things are made up of one or more cells
All living things rely on several different types of cells.
Those are what I feel are the answers
The scientific experiment sets a goal, it is tested by experiments reportedly and cannot be proved false is known as theory, hence for question 1 option d is correct.
Cell theory defines all dividing cells as coming from another cell, hence question 2 option b is correct.
What is the goal of scientific experiments?The goal of scientific experiments is to know how repeatedly a world changes during evolution, experiments lead to new theory and facts which is useful for the next research.
In 1600 when advanced microscopy is discovered, cells can be studied more accurately and cell theory was proposed, and it is defined as every cell coming from another dividing cell.
Experiments sets new discovery in the world which is helpful in the field of science, it sets new theory, rule, and facts.
Therefore for question 1 options d theory is correct and for question 2 option b is correct.
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State two reasons why some molecules can pass through a certain membrane, but other molecules can not.
Answer:
Size and polarity
Explanation:
I can think of two reasons:
Size — the molecules may be too big to pass through the pores of the membrane Polarity — polar molecules and ions cannot pass through a nonpolar membrane.
Which of these is a main goal of CITES?
A. To ensure that international trade does not threaten species
survival
B. To promote the conservation of plant genetic resources
C. To keep flyways safe and natural for migrating bird species
D. To promote open and profitable international trade
Answer:
The answer is : to ensure the international trade does not threaten species survival. APEX
Explanation:
The main goal of CITES is to ensure that international trade does not threaten species survival. The correct option is A.
What is CITES?The Convention on International Trade in Endangered Species of Wild Fauna and Flora is abbreviated as CITES.
The primary goal of CITES is to regulate and monitor the international trade of endangered animal and plant species in order to ensure their survival.
The goal is to prevent species overexploitation through international trade by imposing controls and regulations on their trade.
The ultimate goal is to keep ecosystems balanced and to ensure that threatened and endangered species are not harmed by international trade.
The primary goal of CITES is to ensure that international trade does not endanger the survival of species.
Thus, the correct option is A.
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The liver _____. helps digest food stores bile carries oxygen makes red blood cells
Helps digest food
bile is not stored in the liver, its is only made
Answer: Helps digest food
HOPE THIS HELPS!!!!!!!!:)
Explanation:
I took the test
Wild animals are commonly divided into groups with similar characteristics. The two categories used for mammals are:
Mammals are broadly categorized into three groups: monotremes, marsupials, and eutherians (placental mammals). Each of these groups has distinct reproductive characteristics such as egg-laying in monotremes, pouch nurturing in marsupials, and the presence of a complex placenta in eutherians.
Explanation:Modern mammals are commonly divided into three broad groups: monotremes, marsupials, and eutherians (or placental mammals). Monotremes are unique among mammals as they lay eggs rather than giving birth to live young. Marsupials give birth to very immature young, which typically complete their development in a pouch.
Eutherian mammals, also known as placental mammals, possess a complex placenta that connects a fetus to the mother, allowing for gas, fluid, and nutrient exchange. All mammals nourish their young with milk, which is derived from modified sweat or sebaceous glands.
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The three primary groups of mammals are monotremes, marsupials, and placental mammals. Monotremes lay eggs, marsupials give birth to partially developed young that continue to develop in a pouch, and placental mammals give birth to fully developed young after a longer gestation period.
Wild animals, particularly mammals, are categorized based on their distinguishing characteristics. The three primary groups of mammals are:
Monotremes (Prototheria): These are egg-laying mammals. An example is the platypus. They have a unique reproductive strategy compared to other mammals.Marsupials (Metatheria): Marsupials give birth to partially developed young that typically complete their development in a pouch. Examples include kangaroos and koalas.Placental mammals (Eutheria): These mammals give birth to fully developed young after a longer gestation period during which the embryo is nourished via a placenta. Examples are humans, elephants, and whales.Together, marsupials and placental mammals are known as therian mammals, while monotremes are called prototherians.
Over the last 3.7 billion years or so, living organisms on the Earth have diversified and adapted to almost every environment. TRUE FALSE
Which of the terrestrial planets is closest to the sun? A. Venus B. Earth C. Mars D. Mercury
PLEASE MARK BRAINLIEST!
Answer:
The terrestrial planets mean the planets close to the sun. Mercury, Venus, Earth, and Mars are the terrestrial planets. Which one is the closest out of those four?
Explanation:
While Venus is the hottest, and Earth does have living beings, the closest is D) Mercury. This is because Mercury is the closest to the Sun. Mercury is only 28 - 44 million miles away from the sun, compared to the rest of the terrestrial planets.
I hope this helps!
- sincerelynini
The terrestrial planet closest to the sun is mercury.
SOLAR SYSTEM:
The solar system is a system of planetary network made up of the sun and the eight planets. The sun is the ultimate planetary body, which is surrounded by other planets in different positions. The other planets that surrounds the sun in the order of proximity to the sun are listed as follows:MercuryVenusEarthMars Jupiter Saturn Uranus NeptuneFrom the above list, it can be observed that mercury planet is the closest to the sun.Learn more at: https://brainly.com/question/14306529?referrer=searchResults
18) The Susquehanna River, which runs through the states of New York, Pennsylvania, and Maryland,
received the title of --America's Most Endangered River - in 2005. One of the river problems
results from the large number of sewage overflow sites that are found along the course of the river.
These sewage overflow sites are a direct result of an increase in human population. What effect de
you predict this will have on the biodiversity on the river ecosystem?
a. The biodiversity will decrease due to an increase in pollution
b. The biodiversity of the river ecosystem will decrease due to climate change.
c. The biodiversity of the river ecosystem will increase due to an increase in fertilizer
d. There will be no change in biodiversity of the ecosystem because the sewage will run into the
ocean
The biodiversity will decrease due to an increase in pollution is the effect will have on the biodiversity on the river ecosystem.
Option A
Explanation:
Biodiversity is the actual collection of total amounts of flora and fauna present in a particular ecosystem. The river ecosystem consists of the aquatic plants, the aquatic animals like fishes,etc and even the surrounding land plants and animals, who utilize the river water for their living.
The inclusion of the polluted sewage of the surrounding area into the river directly mixes several chemicals to the water, which are potentially harmful for all the animals living there. This leads to destruction of the flora and fauna of both water and lands surrounding them. This hampers the biodiversity of the water as well as surrounding land.
Explain why the genetic content of individual chromosomes in a spermatozoon most likely differs from the genetic content of individual chromosomes in a primary spermatocyte.
The male reproductive cell or the sperm is a cell possessing a haploid (N) number of chromosomes, while the primary spermatocyte is an immature cell with a diploid number of chromosomes.
The reason for the difference in genetic content of individual chromosomes in primary spermatocyte and spermatozoon is:
Spermatozoon or the sperm cells are the motile full-grown reproductive cells of male organisms. They have a haploid (N) quantity of chromosomes. Sperm cells consist of a tail called flagella, head and body. The spermatozoon is the cell that fertilizes with the female gamete to produce progeny.Primary spermatocytes are immature cells that have a diploid (2N) number of chromosomes.They are the cell that is present in the stage of Meiosis 1, which later forms secondary spermatocytes.The secondary spermatocytes thus formed are haploid in nature.All the male organism produces spermatocytes.Therefore, the genetic content of primary spermatocytes differs from spermatozoon.
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The genetic content of individual chromosomes in a spermatozoon differs from that in a primary spermatocyte due to chromosome number, meiosis, and specialization.
Explanation:The genetic content of individual chromosomes in a spermatozoon most likely differs from the genetic content of individual chromosomes in a primary spermatocyte due to several reasons:
Chromosome number: Spermatocytes are diploid cells containing the full complement of chromosomes (46 in humans), while spermatozoa are haploid cells containing only half the number of chromosomes (23 in humans).Mitosis and meiosis: Spermatogenesis involves two rounds of cell division, meiosis I and meiosis II, resulting in the formation of four haploid spermatids from each primary spermatocyte. The genetic content of these spermatids is further condensed and differentiated to form mature spermatozoa.Specialization and size: Spermatozoa undergo further changes in structure and specialization, such as the development of a streamlined shape, a flagella tail for propulsion, and the loss of cytoplasm except for the compact head. These specializations allow spermatozoa to swim and fertilize an egg.which microorganism present in the intestine of human and animals help in the synthesis and digestion of variety of foods ( please reply )
Answer:
Gut microflora is a combination of many different kinds of bacteria. Out of these, Lactobacillus bacteria, specifically, Lactobacillius acidophilus and Lactobacillus bulgaricus primarily help in the digestion of the milk sugar lactose. Probiotic bacteria in the gut microbiota, primarily, Lactobacillus and Bifidobacterium help in the synthesis of vitamins.
Explanation:
Gut Microbiota:
Gut microbiota are the microorganisms that live inside the gastrointestinal tract and aid in various body functions. Also called commensal flora, many of these help in digestion and biosyntheisis of vitamins.
Lactobacillus species are a predominant component of gut microbiota. Lactobacillus produces an enzyme called lactase that breaks down lactose sugar in milk. Complex sugars in vegetables and fruits are broken down, mostly, by gut microbiota.Probiotic bacteria, Lactobacillus and Bifidobacterium species aid the biosynthesis of various vitamins and nutrients such as:Vitamin K and most of the water‐soluble B vitamins, such as biotin, cobalamin, folates, nicotinic acid, panthotenic acid, pyridoxine, riboflavin, and thiamine.What is the purpose of your answer for question #1?
A)can only move substance into the cell with the use
of ATP
B)is only used to remove large waste products from
the cell
C)are specifically meant to carry the smallest ions in
and out of the cell
D)to assist in the movement of substances across the
membrane by facilitated diffusion or active transport
to assist in the movement of substances across the membrane by facilitated diffusion or active transport. thus option D is correct.
What is diffusion ?Diffusion is the passive process where the movement of molecules occur along with the concentration gradient.
It helps in the movement of solute or solvent in and out of the cells from a region of higher concentration to a region of lower concentration gradient.
Liquid and gaseous state of the substance move by the process of diffusion, some factors are Temperature, Area of Interaction, Size of the Particle, concentration gradient.
Diffusion involve in respiration by diffusing the carbon dioxide gas out through the cell membrane into the blood, also occurs in plant cells mainly root hair cells, ions movement across the neurons.
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Final answer:
The purpose of carrier proteins is to aid in the transport of substances across cell membranes, either by facilitated diffusion or active transport such as the sodium-potassium pump, which requires ATP.
Explanation:
The purpose of the carrier proteins mentioned in question 1 is D) to assist in the movement of substances across the membrane by facilitated diffusion or active transport. Carrier proteins are vital for cell function because they enable the movement of substances that cannot pass through the cell membrane unaided due to their size, polarity, or concentration gradient. While facilitated diffusion does not require energy and moves substances down their concentration gradient, active transport uses cellular energy in the form of ATP to move substances against their concentration gradient. An example is the sodium-potassium pump, which is crucial for maintaining the electrochemical gradient across the cell membrane by moving sodium and potassium ions in opposite directions.
How much of Earth is covered in water
Answer:
75%
Explanation:
yeaoydyidaiydaosdyodsyozdh
Answer:
71% of the earth is covered in water
Explanation:
Students interested int the development of plants designed an experiment to test germination in different types of seeds. They placed 2 pumpkin seed, 2 radish seeds, and 2
zucchini seeds on damp filter paper in 3 different petri dished and observed the dishes for several weeks. The water on the filet paper was slightly acidic in the pumpkin dish,
neutral in the radish dish, and slightly basic in the zucchini dish. Each dish was kept at a different temperature. After several weeks of data collection, the students had a
difficulty coming to a conclusion.
Using complete sentences, please answer the following questions:
a. What errors did the students make in designing this experimental procedure?
b. How could this procedure be changed to make this experiment valid?
Answer a)
The students should only have changed one variable to test for germination of seeds. They should have just changed the seed types and rest all factors like temp, pH should be kept constant for all of them.
Answer b)
The procedure could be changed as follows. The students should place three of each types of seeds in the petri dish. They should keep all the conditions like nutrients, temperature, pH constant for all the three dishes. After this observations should be made to check which seed germinates faster.
A woman is heterozygous for a rare dominant autosomal genetic disease, Neurofibromatosis. She marries a normal man (homozygous recessive for Neurofibromatosis), who has Red-Green Color blindness, an X-linked recessive trait. They have children. What is the chance they will have a girl with Neurofibromatosis?
A. 25%
B. 0%
C. 50%
D. 100%
Answer:
A. 25%
Explanation:
The chance of getting a girl is 50%
The chance of getting a child with Neurofibromatosis is 50%
Multiply the two to find the chance of a girl getting the condition = 25%
carbon__is produced as ____.some and _____relase carbon dioxide as waste.
Answer:
Carbon dioxide is produced as hydrocarbon. Some and glucose release carbon dioxide as waste. I'm not positive this helps, but hope this help.
Explanation:
Most living things need oxygen to survive. These two body systems bring oxygen into your body and then move to all your body parts. What are these two body systems?
Answer:
Circulatory system and respiratory system.
Explanation:
The respiratory system is the system responsible for ensuring the capture of oxygen from the environment and the release of carbon dioxide. In addition, this system is related to smell, that is, our ability to allow odors and is also related to speech, due to the presence of so-called vocal folds in one of the organs of the respiratory system.
When the respiratory system captures oxygen, it gets to see the circulatory system come into action. The circulatory system is the system responsible for ensuring the transport of blood throughout the body, thus allowing our cells to receive, for example, nutrients and oxygen. This system is formed by the heart and blood vessels.
Question 9(Multiple Choice Worth 3 points)
(05.01 LC)
Complete the following statement. The universe is filled with millions of______grouped in clusters.
galaxies
solar systems
planets
moons
Answer:
The answer is "galaxies."
Explanation:
The "universe" is also called "the cosmos." It includes space, time and heavenly bodies such as planets, sun, moon, galaxies, etc.
A galaxy is considered to be a big collection of gas, dust, stars (including their solar systems). All of these are being held together by "gravity." The Earth's galaxy is called the "Milky Way." The name is derived from how it appears from afar.
Other than our galaxy, there are millions or even billions of other galaxies in the universe! They come in different colors, shapes and sizes. They appear clustered together due to "mutual gravity." A cluster consists of hundreds to thousands of galaxies.
HELP PLEASE
a scientist wanted to find out if the amount of plant food affects the number of beans produced in bean plants. How would she label the y-axis?
A. the height of the plant
B. the number of beans produced
C. the amount of water
D. the amount of food
Answer:
Amount of food. She needs to varry the amount of plant food among the different groups so that she can tell how the amount of plant food affects number of beans produced.
6. color blindness is a sex-linked recessive disorder on the X chromosome. If the allele "b" is used to
denote color blindness, circle the genotype(s) that correctly represent(s) a female that is color blind.
BB
Bbbb
XX3
Xpy
Xoxo
YBy
color blindness is a sex-linked recessive disorder on the Y chramanma 16 thullalni
.
Answer:
XᵇXᵇ
Explanation:
The X chromosome is the female sex chromosome and when you have a pair of X chromosomes (XX), then that would denote that the subject is female. Now when it comes to x-linked traits, for a female to be affected, she would have to have the allele on both chromosomes, or in this case, homozgous for color-blindness. (If it is found only on one, she would be a carrier, but she won't be affected.)
So the answer would be: XᵇXᵇ
Final answer:
The correct genotype for a colorblind female is XbXb, which consists of two X chromosomes with the recessive 'b' allele. None of the genotypes listed in the question accurately represent a colorblind female.
Explanation:
Color blindness is a sex-linked recessive disorder on the X chromosome. For a female to be color blind, she must have two copies of the recessive allele "b" on each of her two X chromosomes. Therefore, the correct genotype that represents a colorblind female would be XbXb. None of the genotypes listed in the question (BB, Bbbb, XX3, Xpy, Xoxo, YBy) correctly represent a colorblind female. A colorblind female's genotype should consist of two X chromosomes, both carrying the recessive "b" allele.
There are mountain ranges in the middle of the ocean floor. Because of the higher elevation gravity pushes down on the edges of the plates. This is called ____.
ridge push
slab pull
There are mountain ranges in the middle of the ocean floor. Because of the higher elevation gravity pushes down on the edges of the plates. This is called ridge push.
Explanation:Ridge push is a simple explanation of the height of the landforms based on the gravity and the elasticity of the underlying rock. It says when a landform gets too much higher, the weight of the overlying rock and soil pushes the landform back to plains. Thereby an equilibrium is maintained.
Slab pull is a theory proposed which visualizes the earth interior as a pool of hot molten lava that has a convection current going on. It explains why the crust of the earth continuously moves slowly and forms mountains and other rift valleys.
how the pumping of blood in the right and left ventricle occur at the same time?
Answer:
The human heart has four chambers. The right and left ventricles are the lower two chambers, and the right and left atria are the top two chambers. These four chambers are all connected by valves that control the flow of blood between them. The chambers and valves of the heart and all of the human body’s arteries and veins make up the human cardiovascular system.
Explanation: The right ventricle functions to perform two jobs. It receives from the right atrium blood that has had its oxygen removed by the body. The ventricle then pumps that blood into the pulmonary artery so it can be moved to the lungs.
The pumping that occurs in the ventricles requires more force than the pumping of the atria. This is because the blood travels outside the heart when leaving the ventricles. The aorta, on the other hand, pumps blood to a neighboring chamber. The ventricle’s need to pump the blood farther requires that the walls of the ventricles be thicker than the aorta walls.The heart is made of chambers that both hold and move blood, so there is a system of valves that prevents blood from moving in the wrong direction. Between the right atrium and the right ventricle is the tricuspid valve. The pulmonary valve is between the right ventricle and the pulmonary artery. These two valves keep the flow of blood going in one direction.The system moves blood in two parts. Contraction of the right atrium moves blood into the right ventricle via the tricuspid valve. The pulmonary valve is then closed and the right ventricle fills with blood.After the blood from the right atrium has moved into the right ventricle, the tricuspid valve closes so the blood does not flow backward. The right ventricle contracts and causes the pulmonary valve to open. The blood then moves freely to the lungs without possible backflow because the pulmonary valve closes after the ventricle has contracted completely.In some people, the ventricles can become enlarged, or dilated. Right ventricle dilation is rarer than left ventricle dilation. In either case, the size increase is generally a response by the heart to heal damage by thinning and stretching the muscle. If the heart has been damaged by previous heart attacks, alcohol abuse, exposure to heavy metals, or other harm, then there is a risk of ventricular dilation.
What body part do cnidarians use to trap food? endoderm ectoderm polyp nematocyst
nematocyst is the answer
Which phrases describe air pressure? Select three options.
decreases with denser air
decreases as altitude increases
equals mass divided by volume
results from a column of air pushing on an area
decreases due to fewer air particles pushing down
Pressure is the force exerted, by a substance, per unit area.
Explanation:
Pressure is given by the formulae;
P = F/ A
Whereby;
P = pressure
F = Force
A = area
Remember that ..
F = Ma
Whereby;
F = Force
M = mass
a = acceleration
Therefore pressure can be given as;
P = Ma / A
The mass of the above column of a substance multiplied by the acceleration due to gravity = pressure exerted by the substance.
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Answer:
B. decreases as altitude increases
Explanation:
I did the test
Sulfur dioxide emitted from power plants eventually causes acid rain in the atmosphere. Which term best describes acid rain?
A. Primary and secondary pollutant
B. Secondary pollutant
C. Greenhouse gas
D. Primary pollutant
Answer:
B. Secondary pollutant
Explanation:
Answer:
B. secondary pollutant
Explanation:
i just took the test it was right!
Non-segmentation allows for evolution any innovation in body form true or false
Answer:
False
Explanation:
Segmentation provides scope for evolution. Without segmentation, an organism is unable to move its body structure and hence cannot perform advanced bodily functions. Along with segmentation jointed appendages also provide scope for evolution as these enable an organism to travel and protect themselves from harmful conditions. Segmentation also allows for division which enables an organism to evolve continuously and hence become further advanced to perform much higher activities and functions. Hence, the given statement is false
Sharks, whales, and dolphins share similar features such as body shape and the position of fins. However, sharks have gills for breathing, while whales and dolphins have lungs. These differences indicate that the organisms share a common ancestor for .
Whales also possess a vestigial pelvic bone. The presence of the pelvis bone may indicate that whales .
Answer:
B and C
Explanation:
Sharks, whales, and dolphins' shared physical features suggest a common ancestor. Differences such as gills in sharks and lungs in dolphins and whales show distinct evolutionary paths. The vestigial pelvic bone in whales suggests their ancestors lived on land.
Explanation:Sharks, whales, and dolphins, though having similar physical features such as body shape and fin positions, have different modes of respiration. Sharks possess gills for breathing underwater while whales and dolphins have lungs, indicating evolutionary processes from a common ancestor. The presence of a vestigial pelvic bone in whales further suggests that their ancestors were land-dwelling creatures who possessed full pelvic structures, likely used for locomotion. Over time, as these ancestors adapted to water environments, the need for a full pelvis diminished, resulting in the residual bone we see today.
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Which of the following does not occur due to passive transport?
a. the substance moves to an area of lower concentration
b. the concentration of a solution approaches equilibrium
b. the volume of a solution changes due to the movement of water
d. a concentration gradient of a dissolved substance in a solution is created
Answer:
c - the volume of solution changes due to movement of water.
Explanation:
Passive transport is the movement of a substance from an area of high concentration to a low concentration across a semi-permeable membrane, that occurs without the expenditure of energy.
Option A is true: substances will always move from an area of high concentration to a lower concentration. This creates what is called a concentration gradient (which forms when a physical area contains a range of concentrations of s particular substance (option D). This occurs until the concentration of a solution approaches an equilibrium, as indicated in option B.
However, the movement of substances does not affect the movement of or the volume of water, only the chemicals, ions etc. in the water.
Which features of lungs can be adjusted for different conditions, such as cold or humidity?
Answer
Lungs - "The human body posses to similar structures for inhalations and exhalation of air in the body". As lungs are in a pair and has the capacity of about 5 liters in total".
When the lungs face cold or humid air they operate as follows.
Explanation:
Releasing Histamine
lungs when faces cold air it release the chemical histamine in it so it can contract the soft muscle and contract the air ways.
Humidifying the air
As the human body has an inbuilt system to humidify the air up to 100 percent and 96' F in temperature for better operation.
What are building blocks of lipids
Answer:
Explanation:
One glycerol molecule and at least one fatty acid, with a maximum of three fatty acids. Glycerol is a sugar alcohol with three OH groups.
The building blocks of lipids are:
One glycerol molecule and at least one fatty acid, with a maximum of three fatty acids. Glycerol is a sugar alcohol with three OH groups.