Which of the following physical features make

it possible for amniotes to be completely
terrestrial?



a. their skin
b. their lungs
c. their eggs
d. their four limbs
e. their brains


C

Biology & Microbiology

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The release of factors by cells that influence the activity of nearby cells is referred to as

A. autocrine signaling. B. paracrine signaling. C. pheromonal signaling. D. electrical signaling. E. exocrine signaling.

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Which substances are the most plentiful biological

molecules in the biosphere? a. carbohydrates b. salts and minerals c. proteins d. fats e. nucleic acids

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The type of system depicted in Figure 44-1:

a. can be found in arthropods. b. can be found in cephalopods. c. can be found in annelids. d. has hemoglobin as the oxygen transporting pigment. e. can be found in arthropods and annelids.

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The introduction of invasive species may increase the environmental resistance for a native species

Indicate whether the statement is true or false

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