Embryonic stem cells are taken from:
A) iPS cells. B) blastocysts. C) eggs. D) adult tissues.
Answer: B
Biology & Microbiology
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Bilateral symmetry is characteristic of a(n) ____
a. cnidarian b. roundworm c. echinoderm d. corals e. flatworm
Biology & Microbiology
The graphical representation that shows how usable energy declines as it flows through an ecosystem is a(n) ____
a. Punnett square b. energy flow chart c. energy pyramid d. ecological pyramid e. biomass pyramid
Biology & Microbiology
Which of the following factors is most strongly reduced with increased forest size?
A) density of nymphs B) percent nymphs infected C) density of infected nymphs D) density of deer infected
Biology & Microbiology
The secretion of ____ is an important homeostatic mechanism involved in maintaining normal heart rhythm
a. hydrogen ions b. potassium ions c. water d. glucose e. urea
Biology & Microbiology