Within a food web, herbivores are considered to be
A) basal species.
B) intermediate species.
C) top predators.
D) represented at any level.
B
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Biological magnification of persistent toxins would be greatest in a
A. deer. B. fox. C. polar bear. D. mushroom. E. oak tree. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about biomagnification? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following pairs of career descriptions and work tasks is not correctly matched?
A. Medical microbiologist -- identify the cause of a bladder infection at a hospital lab B. Industrial microbiologist -- manipulate bacterial strains to be less pathogenic C. Public health microbiologist -- track the incidence of AIDS in a population D. Agricultural microbiologist -- identify bacterial causes of crop disease
Genes are composed of
a. DNA. b. proteins. c. chromosomes. d. carbohydrates. e. lipids.
Desensitization of a cell to a ligand may involve each of the following except
A) destruction of the ligand. B) decrease in receptor ability to activate intracellular signaling pathway. C) receptor destruction. D) receptor endocytosis. E) decrease in receptor affinity for the ligand.