B and T cells are two kinds of _______ formed in bone marrow.
a. lymphocytes
b. interferons
c. antibodies
d. effector cells
a. lymphocytes
B and T cells are two kinds of lymphocytes formed in bone marrow.
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As a person goes from rest to full-effort exercise, there is an increase in the _____
A) tidal volume B) vital capacity C) residual volume D) total lung capacity
As oxygen appeared in the atmosphere, ________ also accumulated, which formed a protective barrier that protects the Earth from ________
A) ozone / UV radiation B) elemental sulfur / volcanism C) ferrous iron / hydroxylating radicals D) sulfate / hydrogen sulfide
Group members of ________ are particularly abundant in the oceans, chemoorganotrophic, and often produce pigments when grown on complex media
A) Alteromonas B) Flavobacteriales C) Pelagibacter D) Prochlorococcus
Dispersal can benefit an organism by reducing its chance of inbreeding
a. true b. false