Why does a typical fish die quickly when it is removed from water?
A) Oxygen diffuses more rapidly in water than it does in air.
B) The gills collapse and dry out in the air.
C) Water contains more oxygen, per unit volume, than does air.
D) Gills split water molecules into hydrogen and oxygen, which is used for cellular respiration.
B
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The map distances for four linked genes are as follows: A is 22 cM from B, B is 7 cM from C, C is 9 cM from D, B is
2 cM from D, A is 20 cM from D, and A is 29 cM from C. Based on these data, what is the order of these four genes on the chromosome?
a. ABCD b. ADBC c. ABDC d. BADC e. CADB
Excessive UV light exposure causes problems with what skin protein?
a. collagen b. elastin c. keratin d. collagen and elastin e. elastin and keratin
Konrad Lorenz demonstrated that newly hatched birds would direct their social behavior toward him if they saw him first after they hatched from their eggs. What is this called?
A. imprinting behavior B. operant conditioning C. habituation behavior D. cross-fostering behavior E. fixed action patterning
The evolution of biochemical molecules started on Earth ____.
A. after the appearance of prokaryotic cells B. long before any cells emerged C. after the appearance of eukaryotic cells D. after the appearance of eukaryotic cells but before the appearance of multicellular organisms E. after the appearance of multicellular organisms