In the snail Pomacea patula catemacensis, n = 13. What is the diploid number for this organism?
A) 13
B) 26
C) 52
D) 7
Answer: B
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Pseudocoel means “false body cavity.” Why is this term applied to the body cavity of roundworms?
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Why is it important to include a placebo in a scientific study to assess the effectiveness of a drug?
A. It's actually unethical to do so-if you have a drug that you know to be effective, it's unethical to withhold that treatment from an ill patient. B. A placebo-treated group will determine if the changes observed in the drug-treated illness group are due to a psychological effect rather than a physiologic/pharmacologic one. C. It isn't scientifically important-a placebo simply helps investigators satisfy the legal requirements of the Food and Drug Administration in their testing process. D. A placebo-treated group will determine if the changes observed in the illness in this non-treated group are due to a physiologic/pharmacologic effect rather than a psychological one.
Which pair of organisms would be classified as prokaryotes?
a. Fungi and Plantae b. Bacteria, Archaea and Fungi c. Animalia and Plantae d. Fungi, Plantae and Animalia e. Bacteria and Archaea
Ticks and horseshoe crabs are members of subphylum:
A) Crustacea. B) Insecta. C) Urochordata. D) Chelicerata. E) Uniramia.