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faltersainse [42]
3 years ago
11

If an egg is in one of the fallopian tubes, approximately how many sperm will surround it and try to cross the egg cell's membra

ne?
A. hundreds
B. thousands
C. millions
D. billions
Biology
1 answer:
aniked [119]3 years ago
3 0
C. the penis produces millions of sperms at a time.
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C.) 45 AND 75............
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Pathogens that are catalase-positive, such as Mycobacterium tuberculosis, Legionella pneumophila, and Campylobacter jejuni, make
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Answer:

B)inducible

C. )extracellular enzyme

Explanation:

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Catalase enzymes function in our liver by breaking down harmful hydrogen peroxide into oxygen and water ,during this reaction , the bubbles of oxygen gas that escape create a foam that will help to disinfect any surface touch by the raw liver during this process. Catalase enzymes are extracellular enzyme and are inducible.

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Active and passive immunity involves all of the following except receiving mother's antibodies through breast-feeding. exposure
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Explanation:

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NATURAL ACQUIRED IMMUNITY

when attacked by the same pathogens again, they don't became seriously ill. this is because memory cells are able to recognise the antigens and stimulate the immune system to produce antibodies against the pathogens. This is known as NATURAL ACTIVE ACQUIRED IMMUNITY. It develops when one recovers from an infection.

During pregnancy, the mother passes antibodies across the placenta to the foetus. At birth the baby gets antibodies from the mother through breast milk. This is natural passive acquired immunity.      

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