There are ________ classes of levers.

(a) two
(b) three
(c) four
(d) more than four


(b) three

Biology & Microbiology

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In what discipline did Darwin get his degree

from Cambridge University?

a. biology b. geology c. theology d. genetics e. biogeography

Biology & Microbiology

Athletes and bodybuilders who use growth hormone to improve athletic performance and muscle mass risk

1.hair loss. 2.gigantism. 3.low blood pressure. 4.diabetes. 5.hypothyroidism.

Biology & Microbiology

In generalized transduction, a phage introduces a segment of donor DNA into the recipient cell. This is followed by recombination of the donor fragment with the recipient chromosome. Which of the following must occur?

A) circularization of the donor fragment before recombination B) a pair (or even number) of crossovers between the donor segment and the recipient C) degradation of one of the two strands of phage genome D) replication of the donor segment before recombination E) a single crossover between the donor segment and the recipient chromosome

Biology & Microbiology

Marine mammals, like whales, do not drink seawater.

Answer the following statement true (T) or false (F)

Biology & Microbiology