This animal has a small coelom, soft
unsegmented body, and a radula. This animal
is ___.
a. a slug
b. a leech
c. a scallop
d. an earthworm
e. more than one of these
A
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Which of the following scientists discovered penicillin?
A) Alexander Fleming B) Paul Ehrlich C) Selman Waksman D) Sir Howard Walter Florey
Which structures are homologous to testes in human females?
a. Cowper’s gland b. prostate c. ovaries d. greater vestibular glands
Why are fall and spring temperatures colder in deeper areas of lakes than they are in the winter?
A) Air temperatures are colder in the fall and spring. B) There is a lag in time for the cold water to reach these depths. C) Aquatic animals are more active in the winter. D) Lake stratification causes colder water to sink in spring and fall.
A mechanism for increasing the genetic diversity of offspring is
a. mitosis. b. cloning. c. sexual reproduction. d. cytokinesis. e. fission.