In adults, most blood cells are formed in which type of bones?
a. long leg bones
b. long arm bones
c. hip bones
d. skull
e. small bones of hand and foot
ANSWER: c
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A researcher observed a reduction in the number of chromosomes during cell division for a microbe, he concludes that the microbe must be
A. Eukaryotic B. Prokaryotic C. An archaean D. a virus 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 cell replication? How does it relate to the question? 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?
Paland and Lynch showed that sexual populations possessed fewer deleterious mutations than asexual populations. These results supported the hypothesis that
A. sexual reproduction prevents fertilization with gametes carrying alleles with deleterious alleles. B. sexual reproduction produces fewer random mutations than asexual reproduction. C. asexual reproduction is associated with lower genetic diversity, resulting in the accumulation of highly deleterious mutations. D. in sexual reproduction, the reassorting of alleles allows for the elimination of more detrimental alleles than in asexual reproduction. E. sexual strains are associated with higher genetic diversity and thus accumulate more beneficial mutations than asexual strains.
After reaching the inner ear, the frequency of a sound primarily affects
A. the vibrational amplitude of the tectorial membrane. B. the location of the greatest basilar membrane vibration. C. the amplitude of basilar membrane vibration.
Which of the following soils holds the most water?
A) clay loam on a ridgetop B) sandy loam in a valley C) clay loam in a valley D) sandy loam on a ridgetop