Which of the following mechanisms are used to regulate blood pressure in the closed circulatory system of vertebrates? I) changing the force of heart contraction II) constricting and relaxing sphincters in the walls of arterioles III) adjusting
the volume of blood contained in the veins A) only I and II
B) only I and III
C) only II and III
D) I, II, and III
D
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True or False: The diverse array of Anolis lizards in Hispaniola is the result of several different species of lizards originally colonizing the island. Very little diversification occurred after these colonists arrived at Hispaniola
A. true B. false
Deamination is a spontaneous DNA mutation that converts cytosine to
A) thymine. B) guanine. C) adenine. D) uracil. E) None of these are correct.
If you wish to rid an experimental organism of the function of a gene, you can use RNAi. What would you inject into the organism?
A) co-suppressor with double-stranded (ds) DNA B) ssRNA complementary to cDNA C) ssRNA complementary to mRNA D) dsRNA homologous to the gene E) dsRNA including transposase
In addition to decomposition and decay, what is other major ecological role of the fungi?
a. assisting plants in mineral acquisition b. producing medicines for humans c. performing photosynthesis d. digesting ant species