Some ecologists have proposed that gaps created by disturbances lead to habitat heterogeneity, which, in turn, leads to the coexistence of greater numbers of tree species in tropical habitats, as compared to temperate habitats. Which of the following hypotheses is most closely associated with this proposal?
A) Red Queen hypothesis
D) intermediate disturbance hypothesis
B) character displacement hypothesis
E) energy-diversity hypothesis
C) Hamilton-Zuk hypothesis
Ans: D) intermediate disturbance hypothesis
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All of the following are critical factors for DNA replication on the leading strand EXCEPT?
A. primer B. DNA ligase C. DNA polymerase D. DNA primase E. deoxynucleoside triphosphates
A factor that lowers the likelihood of success when using IVF is
A) advanced maternal age. B) number of previous failed IVF attempts. C) increased time being infertile. D) All of these are correct.
What response would correct for a drop in glomerular blood pressure?
A. stimulation of sodium secretion by the distal convoluted tubules B. inhibition of antidiuretic hormone release by the posterior pituitary gland C. inhibition of osmoreceptors in the brain, leading to decreased thirst D. angiotensin II-mediated inhibition of the adrenal cortex E. dilation of the afferent renal arterioles by angiotensin II 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 glomeruli? What other information is related to the question? Choose Answer Given what you now know, what information 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?
Plant species A has a diploid number of 12. Plant species B has a diploid number of 16. A new species, C, arises as an allopolyploid from A and B. The diploid number for species C would probably be _____
A) 14 B) 16 C) 28 D) 56