Which describes sperm development in correct order?
A. Spermatid, primary spermatocyte, secondary spermatocyte, spermatogonium
B. Sustentacular cell, spermatid, primary spermatocyte, spermatogonium
C. Primary spermatocyte, secondary spermatocyte, spermatogonium, spermatid
D. Spermatogonium, primary spermatocyte, secondary spermatocyte, spermatid
Answer: D
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A drug company produces an anti-venom for snake bites and terms it "snake rescue gamma globulin." The anti-venom is probably made from which type of antibody?
A. IgA B. IgE C. IgM D. IgG E. Could be any of these
If a species of animal evolves over generations to grow a large fan-blade like growth on its back to catch the wind and cool its body, this would be an example of responding to ________.
A. adaptation B. selection pressure C. climate change D. natural selection
Which ion causes neurotransmitter vesicles to fuse with the axon's membrane during the conduction of a nerve impulse from one neuron to the next?
A) chlorine B) sodium C) potassium D) calcium E) magnesium
During skin development, cuboidal cells of the periderm flatten to form the ectoderm.
Answer the following statement true (T) or false (F)