Organisms maintain dynamic homeostasis (internal balance) through behavioral and physiological mechanisms. Which of the following statements is an accurate explanation of a negative feedback mechanism used by animals to regulate body temperature?
A) Squirrels are able to cool themselves during warmer months by producing more brown fat, which contains abundant mitochondria and a rich blood supply.
B) Desert jackrabbits have unusually large ears that serve as solar heat collectors to enable them to maintain their body temperatures.
C) A ground squirrel's hypothalamus detects changes in environmental temperatures and responds by activating or suppressing metabolic heat production.
D) A goldfish slows its movements when the water temperature is lower.
C
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What is the primary difference in how touch sensation and hearing sensation are conveyed?
A. the neurotransmitters secreted by the sensory neurons B. the way that the axons physically connect to the brain stem C. the shape of the sensory axons D. the proteins that transduce the chemical signal in the brain E. the part of the brain that receives the signal 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 sensory signaling? 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?
Which of the following statements about symbiotic relationships are true? Check all that apply.
_____ Plant-pollinator interaction is a good example of mutualism. _____ Both mutualisms and commensalisms result from the process of coevolution. _____ It is sometimes difficult to determine if a specific relationship is mutualism, commensalism, or parasitism. _____ Parasites can sometimes influence the behavior of their hosts to facilitate completion of their life cycles. _____ Mutualists sometimes become parasites.
Approximately what percent of the human genome encodes genetic information?
A. 1 D. 15 B. 3 E. 50 C. 5
What organism is most likely to use anaerobic respiration?
a) bird b) moss c) tree d) yeast