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AnnZ [28]
3 years ago
15

What occurs in prophase I?

Biology
1 answer:
kap26 [50]3 years ago
4 0

Answer: Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears. ... At the start of prophase I, the chromosomes have already duplicated. During prophase I, they coil and become shorter and thicker and visible under the light microscope.

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Active and passive humoral immunity are both mechanisms of adaptive immunity that use antibodies. yes this is true

  • Our adaptive immune system protects us from infection-related mortality. An new-born born with a significantly compromised adaptive immune system may die shortly unless extreme steps are taken to isolate it from a wide range of infectious agents such as bacteria, viruses, fungi, and parasites.
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6 0
1 year ago
Which gland secretes the most important hormone controlling calcium balance in the blood?
quester [9]

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Thus, the calcium balance of the body depends on the secretion of the Parathyroid gland

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3 years ago
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