Answer:
D
Explanation:
Lymphocytes are the second line of defence
First line of defence indiscriminately defends against all pathogens unlike secondary response which is targeted. First line of defence refers to the external body components like skin, secretions from the body in the alimentary canel
Mucus traps pathogens. Stomach acid kills pathogens
<span>Altruism is a selfless behavior so the animal would behave that way because it's intention is to put others before itself.
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C. theory is the answer to your question
Answer:
number three is ghe real answer
Answer:
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Explanation:
