Skeletal muscle growth and development is inhibited by ____ produced in muscle cells
a. erythropoietin
b. acetylcholine
c. epidermal growth factor
d. epinephrine
e. myostatin
E
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What feature in animals is analagous to plant
meristem cells?
a. ectoderm cells b. a gastrula c. blastocyst stem cells d. mesoderm cells e. none of these are analogous to plant meristem cells
Crossing over occurs during ________ and is important because it ________
A) telophase II; creates daughter cells B) prophase I; generates variation C) anaphase II; separates the homologous pairs D) metaphase I; reduces the chromosome number by half
The term motor unit refers to
A) all the muscle fibers that synapse with one motor neuron. B) all sarcomeres within a single muscle fiber. C) an entire skeletal muscle. D) all the skeletal muscles in one region of the body. E) all the motor neurons stimulating a skeletal muscle.
Which of the following classification methods relies on the morphology of organisms?
A) phage typing B) physical characteristics C) biochemical tests D) analysis of nucleic acids E) serological tests