A Barr body in a mammalian female cell represents:a

an inactivated oocyte.
b. a polar body.
c. a degenerate nucleus.
d. an inactivated X chromosome.
e. an inactivated Y chromosome.


D

Biology & Microbiology

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Do both males and females appear to be equally affected?

a. Yes b. No

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The ratio of net productivity at one trophic level to net productivity at the trophic level below it is known as:

1.Ecological efficiency 2.Harvesting efficiency 3.Assimilation efficiency 4.Production efficiency

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The collective human ecological footprint is now much larger than Earth's sustainable resource base

Indicate whether the statement is true or false

Biology & Microbiology

Worms with a well-developed circulatory system (including five pairs of hearts) are

A) echinoderms. B) eels. C) nematodes. D) annelids. E) platyhelminths.

Biology & Microbiology