Which of the following phyla is most closely related to echinoderms?
A) Annelida
B) Mollusca
C) Arthropoda
D) Chordata
Answer: D
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When seeds are removed from strawberries, fruit growth is stopped. This suggests the seeds contain which of the following hormones?
A. strigolactones B. oligosaccharides C. gibberellins D. auxin E. ethylene
If an egg cell contained EDTA, a chemical that binds calcium and magnesium, what effect would this have on reproduction?
A) The acrosomal reaction would be blocked. B) The fusion of sperm and egg nuclei would be blocked. C) The fast block to polyspermy would not occur. D) The fertilization envelope would not be formed. E) The zygote would not contain maternal and paternal chromosomes.
You are a doctor that specializes in diseases such as sickle cell. Which of the following do you study?
The digestion and utilization of this material creates the greatest need for nitrogenous waste secretion by the kidneys.
A. amylose B. lactose C. glucose D. oleic acid E. collagen