________ is the area at the headwaters of a stream where most of the sediment is derived.
What is the product of translation? a strand of rna, an amino acid chain, a nucleic acid chain, or a strand of dna
Because there is more oxygen in an alveolus (sac in the lung) than in the blood around it, oxygen diffuses
Answer:
When there is more oxygen in alveolar sac than in blood capillaries, oxygen will diffuse from alveolar sac to blood capillaries.
Explanation:
The concept behind this is very simple. Oxygen or carbon dioxide move according to their partial pressure differences at various places. Gases always move from an area of high partial pressure to an area of low partial pressure. Pulmonary artery carries the deoxygenated blood from heart to lungs. Near the alveoli of lungs exchange of gases take place. Oxygen from the inhaled air enters into the blood capillaries and carbon dioxide from the blood capillaries move into the alveolar sac for exhalation.
Positive ions from a base and negative ions from an acid form a ________
Answer:
acid form
Explanation:
Why is the small intestine up to 26 feet long?
It is impossible to____ and talk at the same time.A. listen, B. breathe, C. hear. Hearing is when the sound reaches your ears. Listening, however, when it reaches your brain.Hearing is when the sound reaches your ears. Listening, however, when it reaches your brain
The correct answer is option A
Listening is the ability of the brain to understand and react to the words. both the ears and brain is involved in the action of listening.
But hearing only involves the ears not the brain.
While we are talking to somebody we can easily hear all the things that is said but when it comes to listening we need to stay focused as it involves brain.
So, it is impossible to listen while we are talking.
1. ________ are nutrients that supply the main energy source for the body, in the form of sugars.
2. Which of the following is not a type of tissue of the human body?
A.
bone
B.
muscle
C.
connective
D.
epithelial
Both cellular respiration and the burning of fossils fuels release energy. This can be attributed to
A)
the breaking of bonds during oxidation.
B)
the reduction of carbon to carbon dioxide.
C)
the formation of bonds in new organic compounds.
Eliminate
D)
the hydrolysis of water molecules into oxygen and hydrogen.
The answer is
A) the breaking of bonds during oxidation.
Fossil fuel is a hydrocarbon which contains carbon and hydrogen and when it is burnt the carbon forms carbon dioxide and the hydrogen forms water. For both these processes the fuel uses free oxygen from the air. In both cases the formation of the Carbon-Oxygen and Hydrogen-Oxygen chemical bonds produces energy in the form of heat.
Some soils, like clay, hold water tightly. Other soils, like sand, let the water run through. What property of soils is MOST IMPORTANT in determining how water moves through the soil? A) color B) layers C) size of particles D) earthworms present
Answer:
its c: layers
Explanation:
Where do the light-independent reactions of photosynthesis take place?
Stroma of chloroplast
Grana of chloroplast
Membrane of chloroplast
Answer:
Stroma of chloroplast
Explanation:
What is 3 reasons a species may become extinct?
Arteries carry oxygen-rich blood to capillaries.
true or false?
what hormone that causes a decrease in blood glucose
What are X-Rays used for?
A. cook food
B. form images of internal organs
C. get TV signals
Answer:
B
Explanation:
To look inside of human body and see all the organs and other stuff.
Paramecium, shown here, possess ___________ that help counteract the effects of osmosis.
A)
oral grooves
B)
ciliated pellicle
C)
contractile vacuoles
D)
micro and macro nuclei
On the electromagnetic spectrum,
infrared waves have
A. more energy than radio waves but less than microwaves.
B. more energy than radio waves and microwaves.
C. the same energy as microwaves.
Which of the following best explains why vultures are NOT decomposers?
Vultures stalk their prey before killing and eating it.
Vultures do not break down wastes, and only consume meat.
Vultures only eat plants, making them primary consumers.
Vultures only pick at bugs, grub, and other microscopic organisms.
Answer:
Vultures do not break down wastes, and only consume meat.
The biomass pyramids for phytoplankton and trees in their respective environments are _______.
a.
both inverted
b.
the same
c.
opposite
d.
both normal
Answer:
C
Explanation:
edge 2020
what types of animal cells are most similar to undifferentiated plant cells in a tissue culture
Two cells in the same organism differ only in the number of chloroplasts they contain. The first cell has multiple chloroplasts, and the second cell has very few.
What would most likely characterize these cells?
A. There would be no difference between the functioning of the cells because the chloroplasts are not essential cell structures.
B. The second cell would become larger because it would have fewer chloroplasts regulating its size and shape.
C. The second cell would shrink because it would not be able to store water and maintain cell shape.
D.The second cell would not be able to produce as much food because it could not capture sunlight.
The second cell would not be able to produce as much food because it could not capture sunlight. This would most likely characterize these cells because the reason of the chloroplasts that use sunlight energy to make sugar molecules.
Hence, if a cell has more chloroplasts then it would be able to produce more sugar which means more food. But if a cell has less chloroplast then it would not capture sunlight and there will be less food. Consequently, chloroplasts are very important for cell in making food.
Answer: D.The second cell would not be able to produce as much food because it could not capture sunlight.
Explanation:
Chloroplasts are the membrane bound organelles which are typically present on the leaves cells of the plant. These organelles exhibit specialized green pigments called as as chlorophyll. These pigments are capable of absorbing the light energy from sun which is required by these plants for the process of photosynthesis.
In the given situation, the first cell having multiple chloroplasts will be able to produce food by the process of photosynthesis. The second cell having few chloroplast will not be efficient in conducting photosynthesis like the first cell.
On the basis of the above description, D.The second cell would not be able to produce as much food because it could not capture sunlight is the correct option.
Compare and contrast the cell walls of fungi and plants. (PLEASE EXPLAIN)
1) Both cell walls provide structural support but fungi is made of polysaccharides and chitin and plants are made of cellulose.
2) Both cell walls provide protection but fungi are made of cellulose and plants are made of polysaccharides and chitin.
3) Fungi cell walls are made of lipids and plant cell walls are made of nucleic acids.
4) Fungi cell walls and plant cell walls have structures called hyphae.
Correct answer: A) Both cell walls provide structural support but fungi is made of polysaccharides and chitin and plants are made of cellulose.
The plant cell wall is made up of cellulose. It is a complex carbohydrate that is used for the protection and provides structural support to plants. The cell wall of plants has chloroplast.
While the cell wall of fungi does not have chloroplast, they possess a rigid layer of complex polysaccharides called as chitin. It is also known to be found in the exoskeleton of insects and it is known to provide strength to the fungal cell wall.
Hence, the correct answer would be option A.
What two components are often found as part of an enzyme?
Answer:
The correct answer is - Protein (the apoenzyme) and active site (cofactor).
Explanation:
The two components which often present as the part of an enzyme are active site and protein. The part which is protein consists of one or more than one chain of the amino acids that form macromolecules. They perform an essential function within an individual organism.
An active site is the part of an enzyme that binds with the substrate molecule and initiates the enzyme reaction by regulating the chemical reaction.
Thus, the correct answer is - Protein (the apoenzyme) and active site (cofactor).
what can happen to the soil after the mice have destroyed the roots of the grass?
Because of their physical capabilities, mice can cause significant damage. They are ultimate climbers and swimmers. Mice lives in grassy or bushy habitats, where they nest underground in shallow burrows or aboveground in densely vegetated area. They damage the roots of plants that leads to their destruction.
What are the methods to control mice?Mice gnaw and severely damage the bark and roots of young trees. Biting into ripening tomatoes, cucumbers, beans, peas, and other fruit close to the ground.
By digging tunnels, they continuously mix waste and food stores with the soil. The nutrients from the food they eat are thus quickly returned to the soil.
Thus, in this way mice affect the soil leading to destruction of roots.
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a virus is unlike an organism in that the virus is __________.
A virus is unlike an organism in that the virus is not considered a living organism.
Unlike organisms, viruses lack the essential characteristics of life, such as the ability to grow, reproduce independently, and carry out metabolic processes.
Instead, viruses are obligate intracellular parasites that require a host cell to replicate and carry out their life cycle. They consist of genetic material (DNA or RNA) enclosed in a protein coat but lack cellular structures or machinery.
Viruses cannot perform vital life functions on their own and are inert outside a host cell.
Their replication involves hijacking the host cell's machinery to produce new viral particles, highlighting their distinct nature from living organisms.
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During a quiet eruption, a lava flow may set fire to and then bury everything in its path. true or false
The answer is True.
When a volcano erupts, that lava or magma it's made of liquid rock from the earth's core.
It's between 700º and 1200ºC, and it's not possible to control it.
The amount of lava depends on the volcano but, the flow will set on fire everything that touches until the flow stops and goes cooler.
For the past 20 years, the population of the invasive Asian Carp in the Mississippi River has skyrocketed while populations of native species have declined. Which of the following conclusions provides the best explanation for this phenomenon?
a. The carp out-competed the native species for food and space.
b. The food sources preferred by the carp increased.
c. The native species contracted a virus that the carp were immune to.
d. The native species migrated to new areas, while the carp remained. ...?
I think that the answer is A.
The carp out-compete the native species for food and space.
As an invasive species. Some species of Asian carp cause harm when they are introduced to new environments. The black carp feeds on native mussels and snails, some of which can be already endangered. Grass carp can alter the food webs of a new environment by altering the communities of plants, invertebrates, and fish.
the probability that the offspring will be brown colored cat with a long tail is ___
a.25%
b.50%
c.75%
d.100%
The correct answer is option a. 25%.
We need to find out the brown colored cats with long tail.
So, the genotype of the individual must have atleast one B allele and ss allele.
From the punette square given above
The number of offspring having Bbss or Bsbs is 4.
Total number of the offspring is 16.
So, the probability of the brown cat with a long tail is [tex]\frac{4}{16} =\frac{1}{4}[/tex] =25%.
Hence, the brown cat with a long tail are 25% of the total population
What often happens to rocks that undergo chemical weathering?
A. They form crystals.
B. They produce acids.
C. They become stronger.
D. They crumble more easily
Which RNA base pairs with the adenine In DNA
Answer:
The correct answer is uracil.
Explanation:
The associations between the nucleobases take place via the complementarity of nucleobases. In the DNA, the base complements are adenine-thymine and guanine-cytosine. In the RNA, the base complements are adenine-uracil and guanine-cytosine. Thus, only DNA comprises thymine, while in RNA uracil is found in place of thymine.
RNA is a kind of nucleic acid, which performs an essential function in the flow of information from the DNA to the proteins. For the expression of the gene, information has to be conducted via RNA. Each nucleotide in RNA comprises a ribose sugar, a nitrogenous base, and a phosphate group. The nitrogenous bases in RNA comprise guanine, adenine, uracil, and cytosine, that is, thymine gets substituted with uracil.
can you help me Create an analogy describing how 3-4 components of the endocrine system communicate with each other and function effectively.
The endocrine system has many glands that interact with each other through feedback mechanisms to ensure that the correct amounts of hormones are produced at the right time.
How does the endocrine system work?Numerous hormones control a variety of bodily processes, including electrolyte balance, growth and development, metabolism, and reproduction. The body's many glands all create hormones. A variety of releasing and inhibiting hormones from the brain work on the pituitary gland to promote the production of pituitary hormones.While some pituitary hormones have an indirect effect on target organs, others act on other glands spread across the body. The adrenal glands, which predominantly create cortisol, the parathyroid gland, which produces parathyroid hormone, and the pancreas, which produces insulin and glucagon, are additional hormone-producing glands found throughout the body. Many of these hormones are components of regulatory hormonal cascades that also include hormones from the hypothalamus, the pituitary, and one or more target glands.The feedback mechanisms among various endocrine glands act in a loop and ensure the smooth functions of the endocrine system.
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