Paired excretory organs found in most body segments of segmented worms are called
a. metanephridia.
b. parapodia.
c. septa.
d. clitella.
e. setae.
A
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Describe the apoptotic pathway in mammalian cells.
A. Apaf1 inhibits Bcl2, Caspase-8 or 9 is activated, caspases degrade cell components B. Bcl2 activates Apaf1, Caspase-8 or 9 is inhibited, caspases degrade cell components C. Apaf1 activates Bcl2, Caspase-8 or 9 is activated, caspases degrade cell components
At low population density, __________ is favored, quickly producing as many offspring as possible. Fill in the blank(s) with the appropriate word(s)
How did the development of anonymous markers aid in the production of a human genetic map?
A. Anonymous markers are genetic markers that cause a detectable phenotype and can't be detected by molecular techniques. The markers correspond to specific and unique chromosomal regions, thereby allowing for the identification and ordering of particular segments of DNA. Such information was essential to the generation of a human genetic map. B. Anonymous markers are genetic markers that do not cause a detectable phenotype, but can be detected by molecular techniques. The markers correspond to specific and unique chromosomal regions, thereby allowing for the identification and ordering of particular segments of DNA. Such information was essential to the generation of a human genetic map. C. Anonymous markers are genetic markers that do not cause a detectable phenotype, but can be detected by molecular techniques. The markers correspond to specific and unique genetic regions, thereby allowing for the identification and ordering of particular segments of the chromosome. Such information was essential to the generation of a human genetic map.
Short-day plants are those that flower only when the night period of a plant is
A. less than that in summer. B. longer than 12 hours. C. longer than a defined period. D. followed by short periods of light interruptions. E. shorter than 12 hours.