A ______carrier continues to be infectious during the recovery period
Fill in the blank(s) with the appropriate word(s).
convalescent
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All of the following traits are consistent with evolution by sexual selection EXCEPT ____
a. males are larger than females b. females actively choose superior males c. males often bear showy or defensive structures d. males gather and defend harems of females e. gametes are dispersed into the environment by wind or water
Which of the following is least likely to be found in an animal-pollinated plant?
a. scent b. nectar c. bright colors d. inconspicuous flowers e. nutritious pollen
Nondisjunction of chromosomes during
meiosis can lead to
a. directional selection. b. disruptive selection. c. sympatric speciation. d. hybrid sterility. e. allopatric speciation
Wild type blue-eyed Mary has blue flowers. Two genes control the pathway that makes the blue pigment: The product of gene W turns a white precursor into magenta pigment. The product of gene M turns the magenta pigment into blue pigment. Each gene has a recessive loss-of-function allele: w and m, respectively. A dihybrid (WwMm) is self-pollinated. What proportion of the offspring will be magenta?
a. 1/16 b. 3/16 c. 1/4 d. 9/16