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ASHA 777 [7]
3 years ago
8

Is a crab a vertebrate or invertebrate?

Biology
1 answer:
Flauer [41]3 years ago
6 0
Invertebrate, b/c it doesn't have a spine of any kind 

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The _____ system is a communication network closely linked to the nervous system.
choli [55]
The answer is endocrine system. It includes all of the glands of the body and the hormones produced by those glands. The glands are controlled directly by stimulus from the nervous system as well as by chemical receptors in the blood and hormones produced by other glands. By regulating the roles of the organs in the body, these glands help to continue the body’s homeostasis. Cellular metabolism, reproduction, sexual development, sugar and mineral homeostasis, heart rate, and digestion are amid the several processes controlled by the actions of hormones.
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3 years ago
The human stomach secretes an enzyme known as pepsin. This enzyme breaks down proteins into smaller chemical molecules called pe
emmasim [6.3K]
The question here is, is glucose a protein? No, it's not; it's a carbohydrate.

So pepsin would not break it down: it would most probably not react with glucose at all, since pepsin breaks down proteins, not carbohydrates. <span />

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3 years ago
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Describe the PCR technique; include details about the components required in a PCR reaction and the stages of each cycle. Make s
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Answer:

Denaturing – when the double-stranded template DNA is heated to separate it into two single strands. Annealing – when the temperature is lowered to enable the DNA primers to attach to the template DNA. Extending – when the temperature is raised and the new strand of DNA is made by the Taq polymerase enzyme

Explanation:

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4 0
3 years ago
A series of hollow organs joined in a long, twisting tube from the mouth to the anus.​
natita [175]

Answer:

The digestive system!

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The digestive system is made up of the digestive tract - a series of hollow organs joined in a long, twisting tube from the mouth to the anus - and other organs that help the body break down and absorb food.

Organs that make up the digestive tract are the mouth, esophagus, stomach, small intestine, large intestine - also called the colon - rectum, and anus.

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Primary consumers depend on energy from plants for survival. Higher consumers depend on energy from primary consumers for surviv
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The answer is C
The more plants there are, the more consumers there are. If there aren't enough plants, the consumers have no way of getting energy, and therefore cannot survive. The species also matters, because certain species of plants can only be eaten by certain species of consumers.
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