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Alina [70]
3 years ago
7

Please help me I don't understand

Biology
1 answer:
Aliun [14]3 years ago
4 0

Answer:

D

Explanation:

All of the other options go against actual facts and the laws of biology

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How can organisms build large polymers like proteins and starches?
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Answer:

Explanation:

Most (but not all) biological macro molecules are polymers, which are any molecules constructed by linking together many smaller molecules, called monomers. If we were to string many carbohydrate monomers together we could make a polyacrylamide like starch. Proteins can be converted into energy, but your body prefers to use them for more essential jobs. Proteins build and repair every tissue in your body. They’re used to make hormones, enzymes, hemoglobin and antibodies, and they’re responsible for functions such as muscle contraction. The proteins in your body are made from 20 different amino acids. Starch or asylum is a polymeric carbohydrate consisting of numerous glucose units joined by glycogen bonds. This polyacrylamide is produced by most green plants as energy storage.

polymer: A relatively large molecule consisting of a chain or network of many identical or similar monomers chemically bonded to each other.

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A pear plant with the genotype Aa can produce gametes containing:
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Which is true of drugs that decrease membrane permeability to sodium ions? some are used as local. they may block nerve impulses
Ivan
<span>The right answer is: they work by blocking sodium channels in the cell membrane.

These drugs are used systemic and not local.
</span>they block sodium channels in the cell membrane in the synapses between neurons, and not along axons. 
Many drug acts by blocking sodium channel, in a specific location, like antiepileptics in the nervous system, and digoxin and antiarrhythmic in the heart.
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Which tissue type, or organ, is not correctly matched with its germ layer tissue?
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What part of the brain controls breathing and heart rate?
Novosadov [1.4K]

Answer:

B. Brain stem

Explanation:

The brain stem controls basic body functions such as breathing, swallowing, heart rate, blood pressure, consciousness, and whether one is awake or sleepy.

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