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Ipatiy [6.2K]
2 years ago
13

What element is a component of almost all biological molecules (life)? What is the study of this branch of chemistry called?

Biology
1 answer:
Veseljchak [2.6K]2 years ago
5 0

Answer:

Caborn is essential to on Earth

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Botulism and myasthenia gravis are conditions that cause muscle weakness. Which of these statements is NOT true? Botulism and my
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Answer:

Both conditions are caused by an inability of the body to produce adequate acetylcholine.

Explanation:

Botulism is a potentially fatal condition caused by the toxin of bacteria <em>Clostridium botulinum</em>. Early symptoms are weakness, slurred speech, blurred vision etc. It may lead to vomiting, abdominal swelling and respiratory failure if not treated. The toxin hinders the release of neurotransmitter acetylcholine due to which motor neurons are not able to send signals to muscle cells. Muscles are not able to function properly due to which paralysis occurs.

Myasthenia gravis is also a neuromuscular condition like botulism. But unlike botulism release of acetylcholine is not hindered here. The receptors for acetylcholine are destroyed or altered by body's own immune system. Acetylcholine despite being present is not able to relay the signal which leads to muscle weakness. Symptoms are almost similar to those of botulism.

4 0
3 years ago
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The order Cetacea includes modern-day whales, dolphins, and porpoises. These marine mammals share common characteristics that ha
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Answer:

The correct option is A. they evolved from land mammals.

Explanation:

Evolution can be described as a process through which organisms in a species change over a period of time due to the natural selection of the environment. Those organisms that have many similarities in their functions or structures are considered closer to one another and have the same common ancestors.

The properties mentioned in the question about cetaceans resembles the properties of land mammals. For example, cetaceans lack gills and breathe air. Land mammals also do not have gills and need to respire for living. The cetaceans have fin bones which are similar to the limb bones in the land mammals. Hence, these observations show that cetaceas have evolved from land mammals.

8 0
3 years ago
Planets closest approach to the sun is associated with the term
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 <span>Planets closest approach to the sun is associated with the term perihelion. </span>
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3 years ago
A cell can only grow so large in size, because
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<span>A cell can only grow so large in size because its ability to exchange materials is affected by a growing surface-to-volume ratio. Nature designed cells to be small in size because of the network of membranes passing through it. If cells grow any bigger, membranes in it will not be able to pass through its different parts and perform their purpose.


A cell is a network composed of many organelles (e.g. mitochondria, nucleus), that communicate and work together to provide bodily functions. The cell is small so that communication between organelles will be faster and much easier. When cells are small they can be easily repaired when damaged and replicated when needed.</span>
6 0
3 years ago
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The actual exchange of gas occurs at the
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Answer:

gas station, or butt

Explanation:

the gas station can fill your car and exchange gas with the pump. when you fart you exchange gas with the air.

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