About 69% of Earth's freshwater is contained in glaciers. The rest of the Earth's freshwater exists as groundwater, surface water, or in other forms.
Explanation:The approximate percentage of Earth's freshwater contained in glaciers is about 69 percent. Although the Earth might seem abundant in water, not all of it is readily available or usable for human purposes. The majority of Earth's water is saline, contained in oceans and seas. The freshwater on Earth is majorly stored in two forms: ice caps and glaciers, and groundwater. Ice caps and glaciers account for the largest portion of freshwater, while the remaining portion exists as groundwater, surface water, and other sources. Therefore, given the provided options, the correct answer is 69 percent.
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What is the role of specialized cells in the body? Choose the correct answer.
Specialized cells perform specific functions for the body, enabling the organism to survive.
Specialized cells create stem cells for differentiation.
Specialized cells, made from stem cells, can change roles to fit the needs of the organism, enabling the organism to survive.
Answer:
Specialized cells perform specific functions for the body, enabling the organism to survive.
Explanation:
Some cells in multicellular organisms are modified to carry out a particular function, such as transporting a certain substance or executing a specific task. These cells are called specialized cells
Specialized cells are designed to carry out a specific function in the body. The specialized cells are found in multicellular organisms.
The role of specialized cells in the body is to perform specific functions for the body, enabling them to survive.
The types of specialized cells performing different functions can be explained as:
Red blood cells are specialized to carry oxygen and transport it to different parts of the body.White blood cells are specialized to kill and eliminate the invading foreign particles and pathogens. Reproductive cells such as ova and sperm are involved in the reproduction and transmission of hereditary information from the parent to the daughter cells.
Thus, the correct answer is Option A.
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List the inputs and outputs of photosynthesis. What part(s) of the plant are responsible for taking in each of the inputs?
Answer:
List the inputs and outputs of photosynthesis. What part(s) of the plant are responsible for taking in each of the inputs?
6CO2 + 6H2O ------> C6H12O6 + 6O2
inputs outputs
6CO2= Carbondioxide(6 molecules of carbon and 12 molecules of oxygen)
6H2O= Water (12 molecules of hydrogen and 6 molecules of oxygen)
C6H1206= Glucose (6 molecules of carbon, 12 molecules of hydrogen and 6 molecules of oxygen)
6O2= Oxygen (12 molecules of oxygen)
The plant(s) part responsible for photosynthesis is the leaf because it contains the chloroplast that houses the chlorophyl which enable it to tap sunlight for photosynthesis to take place
Explanation:
Photosynthesis is a cellular metabolic process, regulated by enzymes, its inputs and outputs are the following:
Its inputs are: carbon dioxide and water from which organic compounds are synthesized, using the light absorbed by pigments as an energy source.In plants the fixation and reduction of carbon dioxide takes place in the stroma of the chloroplast.The xylem carries water from the roots, spreading through the stem and out of the veins of the leaves.Light energy is absorbed by chlorophylls and carotenoids and is stored at the end of the photosynthetic process as chemical energy.CO2, water and light energy are used to make the outputs: sugar and oxygen.Plants use the sugars produced in photosynthesis as a food source that is energy for the plant.Therefore, we can conclude that photosynthesis captures the light energy of the Sun and uses it to bind CO2 and form sugars.
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How does global warming lead to climate change?
Answer:
global warming leads to climate change as global warming is caused by carbon dioxide trapped in the earth's atmosphere. sunlight can get trapped in the atmosphere as there is a high concentration of CO 2 so the sunlight hits the CO 2 and it bounces back to earth and because the CO 2 is covering the atmospehere it will keep on reflecting and that heats up the air causing water to evaporate and the climate to change
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Scientific knowledge is both long lasting and always _______.
A:changing
B: non-observable
C:permanent
D:untestable
Answer:
A. changing
Have a magnifecent day!
Scientific knowledge is both long-lasting and always subject to change. This evolution is inherent to the scientific method which emphasizes constant testing, refinement, and modification of ideas based on new evidence or data.
Explanation:The correct option is A: changing. While scientific knowledge can remain unchanged for a long time, it is always subject to change as new evidence or data emerges. Science is a dynamic and evolving field; scientists constantly test theories and hypotheses and refine them as needed. This is a cardinal characteristic of the scientific method: ideas must be testable and, as a result, potentially changeable. Hence, scientific knowledge is both long-lasting and always changing.
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Organisms in the deepest part of the ocean (the abyssal zone):
A: come up to the surface often to breath
B: do you not need oxygen
C: feed only on minerals
D: Live without any sunlight
Answer:
Option A.
Organisms in the deepest part of the ocean come up to the surface to breath.
Explanation:
Abyssal zone is the part of the ocean towards the bottom. It consists of 83% of the ocean. The zone is completely dark. There is no sunlight striking this zone so the organisms which require sunlight are not found here. The organisms like sharks and deep sea fish in this zone have to reach above them for breathing dissolved oxygen as this zone has no such plants to produce oxygen.An organism has three different versions of Gene Tyx – version a, b and c. Determine the inheritance pattern of this trait. Then list below all of the different genotypes that an organism with this gene could have.
Answer:
The inheritance pattern of these traits will be independent. However, it will depend on the factor that which trait is dominant or recessive. It might also show incomplete dominance.
The different genotypes that organisms of this population might have are aa, ab, ac, bb, bc , cc. If neither of the alleles are completely dominant over the other, then incomplete dominance might exist for such genes.
The inheritance unit of hereditary is called a gene. They get passed on from the parent to their generation through reproduction.
The genotypes this group can exhibit are aa, ab, ac, bb, bc, cc.
The heritage of the gene will be in an independent way.The circumstances on which the inheritance will depend will be based on recessive and dominant alleles.It can also show incomplete dominance.If neither of the character alleles is dominant over another then it might show incomplete dominance.To learn more about allele and inheritance follow the link:
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What does lead exposure cause in children?
diarrhea
cancer
developmental delays
increased appetite
Answer:
Development delays
Explanation:
Cuz it effect the brain the most
Refer to figure 10.13. Which photos (A-I) best illustrate the methods of fossilization or fossil evidence listed below
Answer:
Permineralization:
A. Trilobite fossil
F. Trilobite fossil
B. Fossilized wood
Cast:
G. Fossil dung
Carbonization:
C. Fossil bee
I. Fossil fish
Impression:
D. Fossil brachiopods
Amber:
H. Fossil spider
Indirect impression:
E. Dinosaur track
G. Fossil dung
Explanation:
Permineralization:
The most common process of fossilization in which the remains of the organism, particularly, the internal cavities are replaced by the deposition of minerals carried by water or sediment.
Cast:
Casts are formed when the actual remains and bones of the organism are dissolved, creating a depression or a mould that gradually fills with sediments to form a cast of the exact shape of the original.
Carbonization:
The fossilization process in which only the residual carbon of the living organism remains leaving behind a thin carbon layer.
Impression:
Fossilization that involves the preservation of the prints or impressions of animals and plants when the print is made in silt or mud. This mud or silt hardens to rock.
Amber:
Amber is living organism preserved in fossilized tree resin.
Indirect Impression:
Indirect impressions are two dimensional imprints that do not contain any organic material from the organism itself but give a clue of its existence and biological activity. Footprints, tracks and excrement is fossilized in this manner.
The question focuses on matching photos to different methods of fossilization, requiring reference to textbook figures and flowcharts. The answer would involve examining photo characteristics and comparing them with textbook descriptions of fossil preservation processes.
Explanation:The student's question pertains to identifying methods of fossilization and analyzing fossil evidence, based on images from a textbook. The question requires matching specific photos illustrating different fossilization processes to a list of such methods. To address such a question, one would typically refer to the figures provided in the textbook, which likely include visual examples of petrification, mold and cast fossils, amber preservation, permineralization, and other types of fossil evidence. Utilizing the flowcharts and exercises mentioned, such as Figure 6.10 and Exercise 6.2, would aid in understanding the mode of preservation. Additionally, figures showing the evolutionary progression of species through fossil records, such as whales and horses, provide context for understanding the diversity and history of life on Earth as evidenced by fossils.
When helping a student with this type of inquiry, a tutor would guide them to look at the characteristics of each photo, such as whether there is presence of original biologic material, positive and negative relief, and mineral composition, and compare these with the types of fossilization processes described in the textbook. Being able to identify such features enables one to determine fossil evidence and likely methods of fossilization. Critical thinking may also be applied in assessing whether certain fossils suggest organisms are now extinct, by identifying unique features not found in modern-day species.
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water plays an important role in the chemical weathering of rock in 3-5 sentences identify and explain two agents of chemical weathering to support that statement
Answer:
Firstly, water can mineralize the chemicals through hydrolysis. This is achieved through the reactive nature of Hydrogen. Upon reaction, the chemically available compound disossciates and mineralizes. Secondly, water can react with CO2 to form carbonic acid which is a weak acid. Although it gets partially ionized, it can dissocilate minerals such as CaCO3 in the rock with the passage of time.
Water plays an important role in the chemical weathering of rocks. Two agents of chemical weathering are hydration, where water molecules combine with minerals in the rock, and dissolution, where water dissolves soluble minerals in the rock.
Explanation:Water is an important agent of chemical weathering in rocks. Two examples of chemical weathering agents are hydration and dissolution.
Hydration: In this process, water molecules combine with minerals in the rock, causing them to expand and become unstable. Over time, the expansion and contraction of these minerals leads to the breakdown of the rock. An example of hydration is the weathering of feldspar, a common mineral in granite, which can transform into clay minerals through hydration.Dissolution: Some minerals are soluble in water, meaning they can be dissolved. When water comes into contact with these minerals, it can dissolve them, leading to the breakdown of the rock. An example of dissolution is the weathering of limestone, which is composed mainly of the mineral calcite. Calcite is easily dissolved by slightly acidic water, resulting in the formation of caves, sinkholes, and other features.Learn more about chemical weathering here:https://brainly.com/question/33904386
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The composition of the sun is best described as-
Final answer:
Hydrogen and helium constitute 98% of the Sun's mass, and the Sun is predominantly a hot ionized gas called plasma, structured in layers such as core, radiative and convective zones, and various atmospheric levels.
Explanation:
The composition of the Sun is best described by its major constituents: hydrogen (about 74% by mass) and helium (about 24% by mass), which together make up 98% of the Sun's mass. The rest is a mixture of heavier elements such as oxygen, silicon, and aluminum. The Sun's structure includes several layers: the core, where nuclear fusion occurs, the radiative zone, the convective zone, and several layers of the solar atmosphere, namely the photosphere, chromosphere, transition region, and corona. Additionally, the Sun is predominantly composed of ionized gas known as plasma, with a consistent bubbling and changing surface, featuring phenomena like sunspots, solar flares, and prominences that can impact Earth.
Compare homologous and analogous structures
Answer:
Homologous structures can be described as the structures which are similar to one another present in different organisms. These similarities depict that the organisms might have a common ancestor i the past. For example, the forelimb of man, birds, dogs.
Analogous structures can be described as structures in different organisms which perform the same function but might not have a common origin. For example, the wings of bats and birds.
How many fingers did T. Rex have?
Answer:
Rex is not a Tyrannosaurus rex because each of his hands has three fingers. Tyrannosaurus had only two fingers on each hand.
Answer:
two fingers on one hand and two on the other
which characteristics are present in both the squid and dolphin but isn't present in a jellyfish
Answer:
complex organ systems, nervous system, while complex organ systems are absent in jellyfish, Both squid and dolphin are triploblastic (having three tissue layers), while jellyfish is diploblastic (having two tissue layers).
Explanation:
How would scientists determine that punctuated equilibrium occurred by examining the fossil record?
Scientists cannot tell if punctuated equilibrium occurred by looking at the
fossil record
Scientists can tell that punctuated equilibrium occurred when they see a
gradual change in organisms in the fossil record
Scientists would have to have the fossils of all organisms in a certain
species to be able to tell if punctuated equilibrium occurred.
Scientists can tell that punctuated equilibrium occurred if they examine
the fossil record and see that one organism rapidly evolved different
characteristics
Answer:
The answer is: Scientists can tell that punctuated equilibrium occurred if they examine the fossil record and see that one organism rapidly evolved different characteristics.
Explanation:
The theory regarding "punctuated equilibrium" followed after Darwin's Theory of Evolution. According to Darwin, species evolved over time. However, evidence supporting it is lacking when it comes to fossil record. He thought that this was because the fossils were incomplete.
Darwin's idea was contradicted by evolutionary scientists, named Stephen Gould and Niles Eldrege. According to them, species change after millions of years (this phase is called "punctuated") and their change is sudden (and not gradual). This sudden change is very rapid, thus causing a fewer number of fossils being left behind. Most species who undergo speciation, occur in a different geographic location, thus leaving only a few number of fossils.
So, this explains the answer.
After buying a new house by the lake, the Harrison's decided to cut down the trees and bushes that were blocking
their view. This left an open area with no vegetation between the house and the lake. What type of pollution is
demonstrated in this real world example?
Toxic
Sediment
Nutrignt
Bacterial
Final answer:
The Harrisons' actions of removing vegetation by the lake lead to sediment pollution, which can carry various pollutants into the water and disrupt the ecosystem. Option B
Explanation:
The real-world example of the Harrison's cutting down vegetation and leaving an open area between their house and the lake is an instance of sediment pollution. When vegetation that stabilizes soil is removed, there is an increased risk of erosion. Soil particles, also known as sediments, can be swept into the lake, particularly during rain events. This sediment can cloud the water, reducing sunlight for aquatic plants, and can carry other pollutants such as pesticides and bacteria into the lake. This process disrupts ecosystems and can lead to negative consequences such as turbidity and eutrophication.
The cell in the diagram below illustrates a stage of mitotic cell division.
Letter B indicates the
1. Paired chromosomes
2. Centrioles
3. Cell plate
4. Endoplasmic reticulum
Letter B in the cell diagram illustrating a stage of mitotic cell division indicates the centrioles.
One of the main functions of the centrioles during cell division in the animal cell is to help in the formation of spindle fibers.
The fibers attach to chromosomes at the centromeres during metaphase and their shortening leads to the pulling apart of sister chromatids. Continuous shortening helps chromatids to complete their migrations to the poles.
Centrioles are vital parts of the centrosomes and are found only in animals, fungi, and some algal cells. In the diagram, the two centrioles can be seen at the two poles of the cell.
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What do the c cells of a thyroid gland produce
Calcitonin is a hormone produced by the c cells of the Thyroid gland.
Explanation:
The c cells present in the thyroid are otherwise called Parafollicular cells. The primary function of c cells is to secrete Calcitonin (a protein hormone) which has a minor role in calcium regulation.Calcitonin decreases the parathyroid hormone (PTH), by lowering blood calcium level by suppressing osteoclast activity of bones and increases of calcium Which is excreted along with the urine.The C cells are found next to the Thyroid follicles and present in the connective tissue.
The C cells or parafollicular cells of the thyroid gland produce a hormone known as calcitonin, which plays a crucial role in the regulation of calcium levels in the body.
Explanation:
The C cells, also known as parafollicular cells, of the thyroid gland produce a hormone known as calcitonin. Calcitonin is an important hormone for the regulation of calcium levels in the human body. It works in tandem with the parathyroid hormone to decrease high calcium levels in the blood. When the blood calcium level is high, calcitonin is secreted. This hormone then stimulates the transfer of calcium from the blood into the bones, thus reducing the calcium level in the blood.
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How did modern dogs evolve? Who are their ancestors
Answer:
modern dogs evovled from grey wolves to modern dogs
Explanation:
Water is a product of cellular respiration. Which term best describes water in
photosynthesis?
O
A. Enzyme
O
B. Waste
O
C. Reactant
O
D. Product
Answer:
reactant
Explanation: water provides hydrogen during photosyn thesis for glucose
Choose three different chains of energy conversions that you use at home or at school to accomplish tasks in your daily activities.
Answer:
There are different energy conversions which we encounter in day to day life. Some of them are:
1) We use chemical energy in the food to convert it into mechanical and kinetic energy which we need for walking to the school.
2) We use chemical energy to be transferred into electrical energy which is converted to light energy in our bulbs so that we can see.
3) We convert electrical energy in the toaster to thermal energy to make breakfast.
Which clue would tell if the lac operon is on?
The repressor protein has fallen off the molecule.
Lactose is absent.
RNA polymerase is blocked by the repressor.
The cell membrane changes.
Answer:
RNA polymerase is blocked by the repressor
The lac operon is on when the repressor protein get fallen off the operator.
What is Lac operon?An operon or a group of genes with a single promoter, which encodes genes for the metabolism and transport of lactose in E.coli and other bacteria. In the process, the group of three genes need to be turned on before the bacterium, that is, E.coli can utilize lactose as food.
In the absence of lactose, the lac repressor, that is, the DNA-binding protein combines with the region known as the operator that switches off the lac operon. When binding of lactose takes place with the repressor, it makes the repressor to fall off the operator, hence, turning the operon on.
Thus, when the repressor protein gets fall off the molecule, it shows that the lac operon is turned on.
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2. In a certain species of aliens, there are three main skin colors. This is an example of which type of inheritance
This is an example of Codominance inheritance
Explanation:
A correlation among pair of variants of a gene is termed as Codominance. Unit version of a gene is obtained by individual, designated an allele, from all parent. The ruling allele will be revealed,when the alleles are varied. They are screened if they are the outcome of the additional allele, termed recessive.
The appearance of the a allele is not disguised by another allele is the concept of Codominance . When specifying alleles for codominance, the code is to practice a standard character to express dominant and recessive and do superscripts to describe the various codominant alleles.
Answer:
codominance
Explanation:
I took the test
What is produced by the lymph system?
A.) lysozymes
B.) antigens
C.) white blood cells
D.) bacteria
Answer:
C
Explanation:
Answer:C. White blood cells
Explanation:
The lymphatic system produces white blood cells or lymphocytes that gets rid of toxins in the body. Also it serves where lymphocytes make antibodies to combat pathogens invading the system.
5. A scientist is writing an article about the classification of various types of bacteria. Which statement is most relevant to the article?
A. Bacteria can be grouped according to the environment in which they live.
B. Bacteria can be grouped according to their method of reproduction.
C. Bacteria can be grouped based on their size.
D. Bacteria can be grouped based on their shape.
6. A diagram of a unicellular microscopic organism is shown below.
It is possible to conclude that the organism is most likely eukaryotic because of it
A. has ribosomes
B. has a cell membrane
C. has a flagellum
D. has a Golgi apparatus
Answer:
5. D. Bacteria can be grouped based on their shape.
6. D. has a Golgi apparatus
Explanation:
5.
Bacterial Classification:
Bacteria are unicellular prokaryotic microorganisms. Classification based on size is the most basic classification of bacteria.Bacteria are classified in 5 groups on the basis of size:Cocci (spherical)Bacilli (rod shaped) Spirilla (spiral shaped)Vibrio (comma shaped) Spirochaetes (corkscrew shaped)6.
Organelles in Eukaryotic and Prokaryotic Organisms:
Eukaryotic organisms are defined by the presence of a nucleus and membrane bound organelles.Prokaryotic organisms do not contain a nucleus or membrane bound organelles.All cells (prokaryotic or eukaryotic) contain a cell membrane, DNA, cytoplasm and ribosomes.Eukaryotic organisms also contain the Golgi complex that is absent in prokaryotes.what is the path of H+ions through the thylakoids
Answer and Explanation:
Hydrogen ions in the thylakoid space form an electrochemical gradient because of the difference in the concentration of protons (H+) and the difference in the charge across the membrane that they create. This potential energy is stored as chemical energy in ATP through chemiosmosis. The hydrogen ions are allowed to pass through the thylakoid membrane through an embedded protein complex called ATP synthase. Energy from the electron fuels membrane pumps that actively move hydrogen ions against their concentration gradient from the stroma into the thylakoid space. The photon causes an electron in the chlorophyll to become excited.
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fossilized remains of plants and animals are an example of micro-nutrient
A. sequestration
B. transference
C. erosion
D. deposition
the shape of the eye is largely determined by the
Answer:
Vitreous
Explanation:
Vitreous is the clear gel that fills the space in the ye and gives it the shape.
The eye is not the perfect sphere, it is made of two parts that are connected. The vitreous is a clear substance that fills in the eyeball. It is made of water. It is like glass.
What is a person's perception and expression of individual qualities and group
membership called?
Answer: Identity
Explanation:
Answer: identity
Explanation:
a p e x
how do goblet cells protect gas exchange from pathogens
Need the Answer ASAP
Sexual reproduction produces genetically different offsprings which do possess variations, hence better chance to survive in the environment.
Option C
Explanation:Sexual reproduction is the process of reproduction where there's a fusion of gametes from a male and female of the same species, resulting in a zygote and eventually an offspring. Sexual reproduction is very advanced type of reproduction which is very expensive for an organism. Much of the energy of the organism is spent to produce gametes and other necessary processes for reproduction.
Gametes of the sexual reproduction is produced mainly by means of meiotic cell division. This involves crossing over and chaismata formation which helps in genetic variations in the offspring. These variations help the species to survive unknown changes in environment, and helps to adapt quickly lessening the chances of extinction. So sexual reproduction has modified various times in different groups of species.