Well-developed vascular systems are absent in all of the following except
A. hornworts.
B. Pterophytes.
C. liverworts.
D. Charophytes.
E. mosses.
Answer: B
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In the section "Investigating Life: Birds Do, Bees Do It", the experiment supports that a change in just one gene locus may have jump-started speciation in Mimulus. This is an example of
A. pre-zygotic barriers to reproduction. B. post-zygotic barriers to reproduction. C. gradualism. D. punctuated equilibrium. E. asexual reproduction.
denaturation
What will be an ideal response?
________ refers to the removal of an amino group from an amino acid. One mechanism for this removal is ________, in which the amino group is transferred to an acceptor molecule.
A. Deamination; transamination B. Deamination; hydrolysis C. Transamination; deamination D. Hydrolysis; transamination
Allergies occur when the body responds to _____
a. pathogens c. normally harmless substances b. toxins d. all of these