Although the Arctic fox and the kit fox are closely related, they look very different because the individuals

A. acquired traits during their lifetimes that contributed to survival
B. with traits most suited to their environments reproduced most successfully
C. migrated long distances to environments that most suited their traits
D. passed on to their offspring acquired behaviors that were helpful


Answer: B. with traits most suited to their environments reproduced most successfully

Biology & Microbiology

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Male lizards experimentally dosed with supplemental testosterone were more active, displayed more

often, and had a higher rate of death.

Indicate whether the statement is true or false.

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Eukaryotic genes consist of protein-coding sequences and adjacent regulatory sequences

Indicate whether the statement is true or false.

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In panel 4, the base-paired DNA fragments are joined together with ____

a. DNA polymerase b. RNA polymerase c. reverse transcriptase d. DNA ligase e. restriction endonuclease

Biology & Microbiology

Several different classes of enzymes are needed for the catabolism of carbohydrates. Which of the following descriptions best matches the function of an isomerase?

(a) An enzyme that catalyzes the rearrangement of bonds within a single molecule. (b) An enzyme that catalyzes a change in the position of a specific chemical group within a single molecule. (c) An enzyme that catalyzes the oxidation of a molecule by removing a hydride ion. (d) An enzyme that catalyzes the addition of phosphate groups to other molecules.

Biology & Microbiology