How many chromosomes does an individual with Turner syndrome have?
A) 2n + 1
B) n + 1
C) 2n ? 1
D) n ? 1
C
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What is the main cause of carbon dioxide build-up in the atmosphere?
a. burning fossil fuels b. deforestation c. droughts d. flooding e. respiration due to overpopulation
Height, weight, and eye color are examples of
phenotypes that illustrate all BUT a. polygenic inheritance. b. continuous variation. c. pleiotropy. d. the action of several gene pairs each with additive effects. e. the cumulative effect of several gene products acting to determine phenotype.
Which of the following animals is an ectotherm?
A) human
B) parrot
C) spiny lobster
D) field mouse
Endotoxins are
A) associated with gram-positive bacteria. B) molecules that bind nerve cells. C) part of the gram-negative cell wall. D) excreted from the cell. E) A-B toxins.