Solid worms that lack a body cavity are known as
A. acoelomates.
B. triploblastic.
C. diploblastic.
D. pseudocoelomates.
E. coelomates.
Answer: A
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The molecule shown above is testosterone, a substance that has important regulatory functions in
humans and many other animals. Molecules with regulatory functions like testosterone are called ____.
a. phytosterols b. enzymes c. lipoproteins d. hormones e. receptors
PCR uses a special DNA polymerase that
a. resists low temperatures. b. resists acids. c. resists bases. d. resists high temperatures. e. resists centrifugation.
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.
Which of the following methods may introduce foreign DNA into a recipient?
A) transformation
B) transduction
C) conjugation
D) transformation, transduction, and conjugation