Which of the following is a component of the fossil record?
A) the distribution of murid rodents in Australia and Asia
B) the similarity of the forelimbs of cats and bats
C) molecular sequences
D) bones of extinct whales
D
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When two genes are located on different chromosomes, ____ of the offspring from a testcross for genetic linkage
should have a recombinant phenotype
a. over 75% b. about 50%
c. about 25% d. about 10% e. about 5%
The emergency contraceptive pill (morning after pill) produces a pregnancy rate of about _____ percent
a. 1 b. 5 c. 10 d. 20 e. 50
Cystic fibrosis is caused by a recessive loss-of-function mutation that encodes a protein called the ________
A) cystic fibrosis transmembrane ion channel B) chloride ion transmembrane conductance regulator C) cystic fibrosis transmembrane conductance regulator D) cystic fibrosis ion channel regulator
The control of Bacteria by antibiotics is often ineffective because
A. Bacteria mutate. B. Bacteria destroy antibiotics. C. Bacteria produce cell walls. D. Bacteria reproduce asexually.