Based on hierarchical levels of biological organization, which of these choices represents the broadest level?

A. Endocrine system
B. 3 toed sloths
C. School of piranhas
D. Amazon Basin
E. Jaguars, giant anteaters, macaws, capybaras


D. Amazon Basin

Biology & Microbiology

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Of the 13 essential vitamins, ____ are water soluble and ____ are fat soluble

a. 3; 10 b. 4; 9 c. 5; 8 d. 9; 4 e. 10; 3

Biology & Microbiology

An example of a prezygotic isolating mechanism is behavioral isolation

Indicate whether the statement is true or false.

Biology & Microbiology

Which of the following is most likely to be correct?

A) Each successional stage always makes conditions more favorable for the next successional stage. B) Each successional stage always makes conditions less favorable for the next successional stage. C) Each successional stage modifies the environmental conditions of the site.

Biology & Microbiology

With regard to reproduction, how do gymnosperms differ from angiosperms?

What will be an ideal response?

Biology & Microbiology