A certain species has offspring that require a very large amount of parental care. Predict their mating system.
A. Polyandrous
B. Polygynous
C. Monotonous
D. Monogamous
Answer: D
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Marfan syndrome can be caused by mutations in either of two genes involved in the disorder, but mutations in one of the genes blocks activity of the other. This means that Marfan syndrome demonstrates
A) variable expressivity and complete penetrance. B) an acquired phenotype. C) late onset and early onset. D) genetic heterogeneity and epistasis.
Four of the five conditions listed below are caused
by recessive genes. Select the exception. a. Huntington disease b. phenylketonuria c. color blindness d. hemophilia e. albinism
The center for control of motor skills and posture is
the a. cerebrum. b. pons. c. cerebellum. d. thalamus. e. hypothalamus.
Biological diversity is an index of the variety of living organisms in an ecosystem, and includes:a
species richness only. b. species richness, genetic diversity, and ecosystem diversity. c. species richness, biosphere diversity, and ecosystem diversity. d. population diversity and ecosystem diversity. e. genetic diversity only.