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erma4kov [3.2K]
3 years ago
13

Organic chemistry is currently defined as

Biology
1 answer:
Airida [17]3 years ago
3 0

Answer:

B

Explanation:

Organic chemistry is defined as the study of carbon compounds.

Organic compounds were first thought to be compounds that could only be produced by living organisms. This theory was disproved when scientists synthetically made urea from ammonia in a lab.

Organic compounds are now known as compounds where carbon atoms are covalently bonded to other elements. This could be hydrogen or oxygen (in the case of lipids or carbohydrates) or nitrogen (in the case of amino acids).

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Which structure of the eye is correctly matched with its function?
ale4655 [162]

Answer: c. iris – controls the pupil

Explanation:

The iris, a structure which is primarily made up of smooth muscles. These smooth muscles surrounds the pupil. The light enters the eye through pupil which is a black hole present in the middle of the eye. It allows the light to strike the retina. It controls the size of the pupil this way it helps in regulating the amount of light entering the eye. The pupil becomes wider in the darkness and becomes narrower when the light intensity is more. These actions are controlled by iris.  

5 0
3 years ago
Read 2 more answers
Look at the following statement. What one word completes the second gap? Substances move by active transport from an area where
Effectus [21]

Answer:

The question is not well structured, the correct one is;

Look at the following statement. What word completes the second gap? Substances move by active transport from an area where they are __________ concentrated to an area where they are __________ concentrated

The answer is MORE

Explanation:

Substances move from one position to another in living systems. This movement of substances can either be passive (without energy) or active (require energy). Active transport of substances involves the movement of substances against their concentration gradient.

Ideally, substances move naturally from an area they are more concentrated to an area they are less concentrated but in active transport, the opposite occurs i.e. substances move from area that they are less concentrated to one that they are more concentrated, which is going up against the normal concentration slope/gradient. Due to this, energy in form of ATP is usually required by the cell to perform active transport unlike passive transport that occurs without energy input.

Exanples of active transport in living cells are exocytosis and endocytosis in some organisms. Based on this explanation, the first gap will be LESS while the second gap will be MORE.

3 0
4 years ago
2) If a species of anoles with dark dewlaps colonized a heavily forested island, predict what would happen over time to the colo
artcher [175]
 Due to natural selection in finding a mate, t<span>he </span>color<span> of the </span>dewlap would start to lighten slightly in order also to <span>adapt to their surroundings.</span>
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Do the light reactions of photosynthesis depend on the calvin cycle?
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Answer:

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3 years ago
Describe how the branches on a cladogram show the relationships among organisms.
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Answer:

relationships among organisms and evolutionary relationships for organisms with a shared common ancestor.

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