The area of Earth that supports life is known as the ____

a. atmosphere
b. biosphere
c. hydrosphere
d. lithosphere
e. stratosphere


ANSWER: b

Biology & Microbiology

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According to the biological species concept, two groups of organisms that are unable to form fertile, viable hybrids are considered to be different

A. races. B. species. C. kingdoms. D. hybrids. E. cohabitants.  

Biology & Microbiology

During meiosis, chromosome number reduction takes place in anaphase II

Indicate whether the statement is true or false

Biology & Microbiology

Cdks are activated only when they bind to

A) centrioles. B) cytosine. C) cyclin. D) chromatids.

Biology & Microbiology

The thoracic cage includes all of the bones below except the ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology