One atomic mass unit (AMU) approximately equals the mass of one
A. proton.
B. electron.
C. nucleus.
D. proton plus the mass of one neutron.
A. proton.
Biology & Microbiology
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Dinoflagellates became photosynthetic via secondary endosymbiosis
Indicate whether the statement is true or false.
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A water-vascular system that operates the tube
feet is characteristic of the
a. arthropods. b. annelids. c. chordates. d. mollusks. e. echinoderms
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What is the first milk that is produced after birth called?
A. prolactase B. colostrum C. hCG D. chorionic lactase E. allantoicase
Biology & Microbiology
A packet of nucleic acid enclosed in protein best describes a(n)
a. virus b. RNA molecule c. bacterium d. alga
Biology & Microbiology