If individuals exhibiting a dominant phenotype are crossed and produce only offspring with the dominant phenotype, which of the following could be the genotype of the parents?
A. Two of the options may be correct.
B. Both are homozygous recessive.
C. Both are homozygous dominant.
D. Both are heterozygous.
E. One is heterozygous and one is homozygous dominant.
Answer: A
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Which area(s) of the molecule shown above is/are variable, and what is the consequence?
A. area A, each individual antibody binds many different antigens B. area A, each individual antibody binds a unique antigen C. area B, each individual antibody binds many different antigens D. area B, each individual antibody binds a unique antigen E. Both area A and area B are variable, allowing the body to produce many different antigens using a relatively small genome.
During quiet breathing, a person's breathing cycle consists of
A) contraction of inspiratory muscles. B) contraction and relaxation of inspiratory and expiratory muscles. C) contraction of expiratory muscles. D) contraction of inspiratory muscles and relaxation of expiratory muscles. E) contraction and relaxation of inspiratory muscles.
As cities along the western coast of North America grew, people began building houses in the chaparral regions
Many homeowners have chosen to landscape with drought-resistant native plants in an effort of conserve water, a valuable resource in this dry biome. Nevertheless, the dry chaparral summer remains susceptible to fires. Nearly every year, fires sweep through the area, destroying homes, displacing people, and costing millions of dollars. What is the best solution to this problem? A) Immediately extinguish all fires in this area. B) Plant tall-growing trees to increase shade. C) Stop building homes in fire-prone areas. D) Plant species from damp areas to increase the moisture content in the area. E) Evacuate people during the fire season.
Where do transcription and translation occur in prokaryotic cells?
A) in the plasma membrane B) in the nucleus C) in the cytoplasm D) in mitochondria