Which of the following is NOT true of hormones?
a. They are found in multicellular organisms.
b. They are chemical messengers.
c. They regulate development.
d. They are a type of gene.
e. They regulate growth.
D
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Cells that produce the pigment found in the epidermis are called
a. Granstein cells. b. keratinocytes. c. melanocytes. d. Langerhans cells. e. adipose cells.
Which of the following events is likely to precede adaptive radiation?
a. A few individuals fly over to an island in the middle of a river. b. An avalanche of rocks falls off a mountain into a small lake. c. A new species evolves gradually over long periods of time. d. The ability to lay water-retaining eggs on land evolves. e. A population is split by the upthrust of a new mountain range.
The viscerocranium and the neurocranium differ in that the viscerocranium describes the ____ while the neurocranium describes the ____.
A. Brain casing; Face B. Face, Brain Casing C. Foramen Magnum, Brain Casing D. Oral Cavity, Brain Casing E. Skull Perforations for Blood Vessels; Remainder of Skull