Which of the following is a tongue-like scraping structure found in mollusks?
a. mantle
b. radula
c. spiracle
d. osculum
b. radula
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Among cnidarians there are two basic body plans, the medusa and the polyp, which differ in that ________
a. the polyp is motile and the medusa is sessile b. the medusa lacks the mesoglea, a buoyant flexible skeletal layer c. the medusa is motile with its tentacles downward, while the polyp is sessile with its tentacles upward d. the medusa has stinging cells called nematocysts but the polyp does not
When affected males produce all affected daughters and no affected sons, the genetic disease is likely
to be ____________________. Fill in the blank(s) with the appropriate word(s).
If both children are of blood group MM, which of the following is possible?
A) Each parent is either M or MN. B) Each parent must be type M. C) Both children are heterozygous for this gene. D) Neither parent can have the N allele. E) The MN blood group is recessive to the ABO blood group.
The rate of energy consumption by an animal is called
A) metabolism. B) digestion. C) metabolic rate. D) glycolysis.