What would be an appropriate independent (treatment) variable for your experiment?
a. How much caffeine (from all sources) participants have consumed the day of the test
b. How much of the energy drink participants report drinking in the last month
c. How well the participants can concentrate during the test
d. How much of the energy drink participants are instructed to drink right before the test Submit
Ans: d. How much of the energy drink participants are instructed to drink right before the test Submit
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Some essential genes and DNA sequences in cells DO NOT encode for proteins but are still essential for cellular growth and replication. Give two examples of a gene or sequence of which this is true and explain why it is essential for growth or replication
What will be an ideal response?
Which of the following is consistent with the principle of base pairing?
a. purine-purine b. pyrimidine-pyrimidine c. adenine-thymine d. guanine-thymine
The part of the brain that controls the basic responses necessary to maintain life processes (breathing,
heartbeat) is the a. medulla oblongata. b. corpus callosum. c. fissure of Rolando. d. cerebellum. e. cerebral cortex.
Hawaiian honeycreepers, which are closely related to North American finches, have been devastated by the introduction of mosquitoes and now survive only at sufficiently high elevations which are devoid of mosquitoes. Given what you know about the potential problems with introduced species, why have mosquitoes been so detrimental to Hawaiian honeycreepers when birds all over the world have been exposed to mosquitoes with little or no negative consequences?
A. Mosquitoes are more abundant on Hawaii than anywhere else on earth due to the tropical trade-winds and moist conditions. B. Mosquitoes are not native to Hawaii and hence Hawaiian honeycreepers have evolved no defenses against the diseases that mosquitoes transmit. C. Hawaiian honeycreepers are competing with mosquitoes for food, and the more aggressive mosquitoes are outcompeting the honeycreepers. D. Hawaiian honeycreepers have only recently evolved (branched off) from the ancestral finch stock and therefore have not had time to evolve defenses against other organisms in their native habitats.