Acne results when
a. bacterial secretions from hair follicles leak
into internal tissues.
b. bacteria that cause acne burrow into open
skin wounds.
c. bacterial secretions are swallowed and
become systemic.
d. bacterial secretions mix with sweat and
become more acidic.
e. bacteria are phagocytized by macrophages
which then become hyperactive
A
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The large surface area in the gut directly facilitates _____
A) secretion B) absorption C) elimination D) filtration E) temperature regulation
Members of this phylum have radial symmetry, and use their two tentacles to capture prey. They have
eight longitudinal plates of cilia that they use for movement, making them the largest animals to use cilia as their primary means of locomotion.
a. Nematoda b. Cnidaria c. Porifera d. Rotifera e. Ctenophora
A(n) ___ is an embryonic form with three
primary tissue layers.
a. zygote b. gastrula c. blastula d. mesoderm e. embryo
What are the segments of DNA that generally code for proteins?
What will be an ideal response?