The nutrient enrichment of an aquatic ecosystem is called ____
a. phosphorylation
b. denitrification
c. nitrification
d. eutrophication
e. ammonification
ANSWER: d
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Genetic counselors are available for diagnosing some diseases, and for helping in family planning. If a genetic counselor examines a pedigree chart and notices an occurrence of a disease in every generation, she has evidence that the disease is caused by
A. an autosomal dominant disorder. B. a chromosomal abnormality. C. having an extra set of chromosomes. D. an autosomal recessive disorder. E. a new reoccurring mutation.
The most important advantage of sexual
reproduction is related to
a. increased production of offspring. b. avoiding predators. c. avoiding harmful mutations. d. producing offspring identical to the parents. e. the advantage of having two sexes
Expression of the Hoxc6 gene causes ____
a. ribs to develop on a vertebra b. the development of eyes c. limb bud development d. gill arches to close e. the development of hair
At night, CAM plants incorporate CO2 into ____, which is stored in the ____ of their cells
a. fructose; vacuoles b. malate; vacuoles c. glucose; starch granules d. pyruvate; starch granules e. acetyl CoA; mitochondria