Explain how cells can adapt to colder temperatures by altering the number of double bonds in the lipids that comprise cell membranes
What will be an ideal response?
ANSWER: Increasing the number of lipids with double bonds in the membrane will prevents the lipids
from packing tightly and orderly, which is required for lipids to freeze.
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Which of the following statements about telomeres is INCORRECT?
A. Telomeres are lengthened by telomerase. B. Telomeres are found at the ends of chromosomes. C. Telomeres are short repeat sequences. D. Telomeres would be longer in cells of older than younger individuals. E. Telomeres are crucial to the viability of a cell that replicates often.
In fungi, both asexual and sexual spores are haploid, and both can germinate into diploid individuals
a. True b. False
Biochemistry is based on the chemistry of which element?
a. hydrogen b. oxygen c. carbon d. sulfur
Alligators more closely resemble lizards than birds; however, alligators and birds have four-chambered hearts, which
lizards do not have. In this example, the four-chambered heart is a ____, which indicates that alligators are ____ related to birds than to lizards.
a. derived character; more closelyb. key innovation; more closely c. derived character; more distantly d. key innovation; not e. homologous structure; more distantly