What makes up an atom?​

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.

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%

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.

Answer:

There would be one season (summer), and it would be always hot

Explanation:

What causes climates and seasons is the tilted orbit of Earth, this is caused by sunlights which come to Earth with different angles all over the Earth. The last palce to get sunlight with 90 degrees are 23 degrees 27 minutes N and S latitudes. When sunlight comes directly to the Earth longtitude between 30 N and S would get sunlights with 90 degrees all year.

Final answer:

Without the Earth's 23.5° tilt, climates at the equator would remain consistently tropical, while regions between 30° north and south latitudes would experience less pronounced seasonal changes with milder temperatures year-round.

Explanation:

If the Earth were not tilted in its orbit, the climates and seasons at the equator and between 30° north and south latitudes would be significantly affected. Instead of experiencing varying seasons, these areas would likely experience a more uniform climate throughout the year. At the equator, where the sun is always high in the sky, there would be very little change in the amount of solar radiation received during the year, resulting in a consistently tropical climate. Between 30° north and south latitudes, variations in temperature and day length over the course of the year would be much less pronounced than they are now. As a result, the seasonal changes we currently experience, characterized by significant shifts in temperature and weather patterns, would be greatly reduced or even non-existent.

The Northern Hemisphere experiences winter when it is tilted away from the sun, leading to more reflected sunlight and less absorption of the sun's energy. Without the Earth's tilt, this phenomenon would not occur, and thus the stark contrast between summer and winter temperatures would be diminished, making for milder seasons. Overall, with a non-tilted Earth, the concept of seasons as we know it would be altered dramatically, leading to a very different climate pattern across the globe.

Answer:

The phylogenetic classification does not tell important information about the organism history rather tells us about the evolutionary history.

Explanation:

This type of classification helps in identification of the groups, identity and through this proper naming can be done . By this similarities in the Genetic structure can also be seen i.e. in the DNA and RNA, their adaptations and also the embryonic development. hence it provides the important information about the evolutionary history. Thus helping in understanding the relationships and evolutionary process easily by the means of phylogenetic classification.

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.

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:

Together, marsupials and placental mammals are known as therian mammals, while monotremes are called prototherians.

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.

Answer:

D. Oceanic and continental plate are converging

Explanation:

Trenches are formed when two tectonic plates converge (move towards each other), specifically, when an oceanic plate and a continental plate converge. The oceanic plate is denser and heavier than the continental plate and when they converge, the oceanic plate is pushed under the continental plate. The plate bends beneath the lighter plate and it creates that v-shaped depression. This process where one plate goes beneath the other is called subduction and the boundary where they collide is called a subduction zone.

Answer:

Explanation:

Ghrelin

produced and released mainly by the stomach with small amounts also released by the small intestine, pancreas and brain

Appetite is controlled by ghrelin

Answer: ummmm b?

Explanation:

Crew members' usual routines, such as eating, sleeping, and hanging out, are greatly hampered by microgravity. Since there is no refrigeration on the space station, food must be carefully stored and frequently vacuum-packed. Thus, option B is correct.

A sizable spacecraft in orbit orbiting the Earth is called the International Space Station.

The space station was created and used by international cooperation. Humans can live in space as long as there is a source of oxygen, heat, water, and food.

Power is provided by four enormous solar arrays, food is transported on board by shuttles, and oxygen and water are produced and recovered by specialized station modules.

Therefore, Life on the International Space Station is completely

different from life on Earth.

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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.

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.

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.  

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:

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.

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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Answer:

Transmission Electron Microscope would show a mitochondria’s internal structure in the greatest detail

Explanation:

The TEM is used to visualise the internal structure of the cells. This works when an electron beam of light passes through the object or the sample, it shows a clear presence of the organelles inside the cell. The TEM uses the energetic electron which provides the morphological as well as compositional and crystallographic features of the cell. Its maximum potential is about 1 nanometre. Among the most powerful microscope for studying the internal organelles of the cell TEM is one.

The electron microscope would show a mitochondria's internal structure in the greatest detail.

The microscope that would show a mitochondria's internal structure in the greatest detail is an electron microscope. Electron microscopes use a beam of electrons instead of light to magnify the image, allowing for higher resolution and greater detail. With electron microscopy, scientists have been able to observe the intricate inner structure of mitochondria, including the cristae and matrix.

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Answer: nucleus, Golgi complex, endoplasmic reticulum, ribosomes, mitochondria, peroxisomes, cytoskeleton, and cell (plasma) membrane

Explanation:

Answer:

The options:

A) They both have ribosomes that are used to synthesize proteins and a cell membrane that serves as a selective barrier for the cell.

B) They both have a central vacuole that stores water and food and mitochondria that releases energy from glucose molecules.

C) They both have chloroplasts where conversion of light to chemical energy occurs and a cell membrane that serves as a selective barrier for the cell.

D) They both have a cell wall that provides protection and support and a nucleus where DNA is stored.

The CORRECT ANSWER IS A)

A) They both have ribosomes that are used to synthesize proteins and a cell membrane that serves as a selective barrier for the cell.

Explanation:

A) They both have ribosomes that are used to synthesize proteins and a cell membrane that serves as a selective barrier for the cell.✔✔✔

Judging from a model of the animal and plant cells, one can infer that ribosomes and cell membranes can be found in them.

B) They both have a central vacuole that stores water and food and mitochondria that releases energy from glucose molecules.❌

Animal cells lack central vacuole that stores water and food. Even if the vacoules are present in some, it's going to be small in size which is unlike that of plant cells that as a central vacuole that stores water and food.

C) They both have chloroplasts where conversion of light to chemical energy occurs and a cell membrane that serves as a selective barrier for the cell.❌

Animal cells lack chloroplasts due to the fact that they don't undergo photosynthesis. Animal cells obtain energy via metabolism of the nutrients it derives from food.

D) They both have a cell wall that provides protection and support and a nucleus where DNA is stored.❌

Animal cell lack the presence of a cell wall. The Animal cell is built mainly of cellulose, a type of carbohydrate, that serve as a means of protection to the cell.

Answer:

If you were studying the causes of cancer, the topic that might interest you is  cyclin-dependent kinases.

Explanation:

Mutation in the proteins can be a one of the most serious cause for the cancer, mutation will occur in the protein that leads to the regulation of the cell cycle, among those one is cyclin dependent kinases. These enzyme will be more useful for starting the understanding the cause of the cancer. These CDKs are found to be involved in the regulation of the transcription, mRNA processing and also in the differentiation of the nerve cells.

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.

Answer:

They initiate various stages of the cell cycle.

Explanation:

Cyclins and cyclin-dependent protein kinases function to control  the cell cycle. A group of cyclins: the G1 cyclins, are synthesized during G1 phase and function  to activate CDPKs which initiate DNA synthesis at the G1/S checkpoint. The cell fails to  progress to S phase if there is no sufficient synthesis of G1 cyclins. After a cell passes through  this point, the G1 cyclins are degraded, allowing for another group of cyclins: the M cyclins  to be synthesized. M cyclins activate a second group of CDPKs which allow  the cell to pass the G2/M control point and into mitosis.

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:

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Answer:

B. Secondary pollutant

Explanation:

Answer:

B. secondary pollutant

Explanation:

i just took the test it was right!

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.

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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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.

Answer:

B

Explanation:

Answer: B. Larva

Explanation: I took the test

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.

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.  

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.

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.