The level of the vertebrate nervous system responsible for the skeletal muscle responses to stimuli is the ___________________ system.
A. sensory
B. somatic
C. sympathetic
D. All of these answers are correct.
B. somatic
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What do scientists use to apply cladistics?
a. homologous traits b. homoplasies c. analogous traits d. monophyletic groups
Freshwater fish are ________ with respect to osmoregulation.
A. hypertonic regulators B. isotonic conformers C. hypertonic conformers D. hypotonic conformers E. hypotonic regulators
Why do aquatic plants frequently have broad, floating leaves?
a. The byproducts of photosynthesis, such as glucose, are naturally buoyant. b. Beneath a certain depth, insufficient oxygen exists to support photosynthesis. c. To maximize their opportunities for photosynthesis. d. Broad floating leaves provide shelter for fish that protect them from herbivores.
Sphynx cats have a mutation in a(n)_____ of the keratin gene, which prevents necessary splicing; therefore, keratin
protein fibers do not assemble properly.
a. promoter b. intron-exon splice site c. exon d. stop codon e. enhancer