Members of this lineage are highly active, have a closed circulatory system, and have a high oxygen
requirement.
a. Cephalopoda
b. Polyplacophora
c. Bivalvia
d. Gastropoda
e. Scaphopoda
A
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The terms algae and protozoa have significant phylogenetic meaning
A. true B. false
With __________, an animal learns to associate an involuntary response to one stimulus with another
stimulus. Fill in the blank(s) with the appropriate word(s).
The presence of which chemical in the blood can indicate that cancer exists somewhere in the body?
a. aldosterone b. interleukins c. cytokines d. HCG e. thyroxine
Which statement about the focusing of light by the eyes is true?
A) Squids and many fishes change the shape of their lenses to focus light. B) Mammals focus light when a rigid lens is moved back and forth. C) Mammals use muscles and ligaments to change the shape of their lenses to focus light. D) Mammalian lenses thicken when focused on distant objects.