Afferent and efferent neurons differ in (select all correct choices):
A. their size.
B. their pattern of myelation.
C. the directionality of the information they
send.
C
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Multigene families
a. come from a single gene duplication event. b. come from repeated cycles of gene duplication followed by mutation. c. from single point mutations. d. come from exon shuffling. e. come from deletions of genes.
Antiseptic surgery was pioneered by
A. Kitasato. B. Pasteur. C. Jenner. D. Lister.
Under the biological species concept, what criterion is used to assign populations of organisms to the same biological species?
A) a very similar appearance B) being able to interbreed and produce fertile offspring C) responding to the environment in the same way D) having 99% of their genes in common
Respond to the following statements with reference to the five plant macronutrients listed below.
A. This nutrient is an important component of proteins and nucleic acids. B. This nutrient helps to maintain turgor pressure in stomata. C. This macronutrient is a main component of all biological molecules. D. This nutrient is essential to formation of chlorophyll and acts as a cofactor for many enzymes. E. This nutrient is a component of ATP.