Heterotrophs must obtain organic molecules that have been synthesized by

A. biogeochemical cycles.
B. autotrophs.
C. decomposers.
D. bacteria.


Answer: B

Biology & Microbiology

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Which of the following is a characteristic of

the plasma membrane?

a. it controls the contents of the cell b. the main lipid of a cell membrane is cholesterol c. carbohydrates carry out most of the cell’s dynamic functions d. it encloses a jellylike mixture called a cytoplastic reticulum e. all of these are characteristics of plasma membranes

Biology & Microbiology

A(n) ____ allows two rival males to assess one another’s strengths without engaging in a potentially damaging fight

a. conditioned stimuli b. eusocial response c. instinctive behavior d. kinetic movement e. threat display

Biology & Microbiology

A deletion may set up a genetic circumstance where a recessive gene is expressed in an otherwise diploid organism

Indicate whether the statement is true or false

Biology & Microbiology

If there are 20 chromatids in a cell, how many centromeres are there?

A) 10 B) 20 C) 30 D) 40 E) 80

Biology & Microbiology