In the study of Gigord and colleagues using Elderflower orchids, the allele frequencies of yellow and purple flowers varied such that when the yellow allele started to become rare, the reproductive success of purple flowers decreased and the
reproductive success of yellow-flowered individuals increased in a process known as ________. A) overdominance
B) frequency-dependent selection
C) underdominance
D) Hardy-Weinberg stabilization
E) frequency depression
B
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Which organism is slightly <-hemolytic after 48 hours and is commonly associated with individuals with anatomic heart defects?
a. K. kingae b. C. hominis c. A. suis d. Capnocytophaga spp.
When an organism (such as a ground squirrel) becomes hypothermic, are ONLY the respiratory reactions likely to be affected, or would the overall metabolism of the organism be depressed?
a. only the respiratory reactions are likely to be affected b. the overall metabolism of the organism would be depressed c. there is little affect on any of the organism's systems
What is the main form of nitrogenous waste released by mammals to their environment?
a. amino acids b. urea c. ammonia d. nitrate
A certain type of congenital deafness in humans is caused by a rare autosomal recessive gene. In a mating involving a deaf man and a deaf woman, could some of the children have normal hearing?
A) Yes, because it's rare. B) No, because the parents would teach their children sign language. C) Yes, because traits assort independently. D) No, since the gene in question is recessive, both of the parents are homozygous and one would not expect normal hearing in the offspring. E) No, traits get passed down from father to child and the father is deaf.