Structures that are shed in one piece include
a. the cuticle of roundworms.
b. the exoskeleton of arthropods.
c. human hair.
d. all of the above.
b
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Which of the following tests is an agglutination test for the bacterium causing typhoid fever?
A. Widal test B. IMViC C. Quellung reaction D. API 20E system
According to the intermediate disturbance
hypothesis, a. species richness becomes greatest in between disturbances of moderate intensity or frequency. b. a disturbance is necessary during succession in order to stabilize the community. c. community succession is highly predictable. d. competition and other species interactions are the most important factors in shaping community structure. e. a community reverts to a climax state after a disturbance.
Which of the following are present in your liver cells?
A) enhancers of genes expressed in the liver B) enhancers of genes expressed in the kidney C) promoters of genes expressed in the liver D) promoters of genes expressed in the kidney E) All of the above are present in liver cells
In peas, Mendel found that tall plants and yellow peas are dominant. The phenotype for a pea plant
with the genotype TtYy would be: a. heterozygous. b. Ty. c. short with yellow peas. d. tall with green peas. e. tall with yellow peas.