A theoretical concept that is used to understand how and why certain organisms can be sorted into discrete taxonomic groups is known as the ________.

A. endosymbiotic theory
B. genotypic concept
C. phylogenetic concept
D. species concept


Answer: D

Biology & Microbiology

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Organisms that obtain heat primarily from the external environment are called ____

a. endotherms b. isotherms c. exotherms d. ectotherms e. allotherms

Biology & Microbiology

Four of the five adaptations below allowed animals to live on land. Select the exception

a. eggs that can develop out of water b. waterproof skin c. lungs d. ectothermy e. internal fertilization

Biology & Microbiology

___________, or water bears, have a reduced coelom and molt. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

The most developed sense in humans is

a. hearing. b. vision. c. taste. d. smell.

Biology & Microbiology