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lesantik [10]
3 years ago
12

A barrier made up of several layers that stops pathogens from entering the body is

Biology
1 answer:
wariber [46]3 years ago
8 0

Answer:

A. The Skin

Explanation:

Skin forms a waterproof barrier that prevents pathogens from entering the body.

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What is synthesized from the DNA template? This is used to assemble ______ into ______.
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Answer:
            The right option for blanks is mRNA, amino acids and polypeptide chain (protein).

Reason:
             During protein synthesis first of all mRNA formation occurs from DNA template. Then mRNA come out from nucleus into cytoplasm and bind with ribosome, where tRNA come and binds to mRNA codon with the help of anticodons. and add amino acids. In this way a chain of polypeptide is formed.
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3 years ago
15. DNA that is derived from the DNA of two or more different species is called —
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Answer:

A

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6 0
3 years ago
Which connective tissue layer directly surrounds each axon in a nerve?
gregori [183]

Answer:

Endonerium

Explanation:

The endoneurium (also called endoneurial channel, endoneurial sheath, endoneurial tube, or Henle's sheath) is a layer of delicate connective tissue around the myelin sheath of each myelinated nerve fiber in the peripheral nervous system. Its component cells are called endoneurial cells.The endoneuria with their enclosed nerve fibers are bundled into groups called nerve fascicles, each fascicle within its own protective sheath called a perineurium. In sufficiently large nerves multiple fascicles, each with its blood supply and fatty tissue, may be bundled within yet another sheath, the epineurium.

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