How do mammals respond to cold stress?
What will be an ideal response?
Blood flow is directed away from the skin and toward the core. Hair can be fluffed up to create a dead space, which slows heat loss. Vasoconstriction of arterioles in the skin reduces heat loss. Shivering increases heat production as does increased mitochondrial metabolism in brown fat.
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What do survivorship curves display?
A. The change that an individual will live to a particular age B. The number of organisms in different age groups C. The population size over time D. The dispersion pattern of a population
Spiny skinned organisms that have a water vascular system belong to the phylum:
a. Echinodermata. b. Chordata. c. Bryozoa. d. Arthropoda. e. Mollusca.
Every year approximately how many women DIE of breast cancer?
A. 5,000 B. 15,000 C. 20,000 D. 25 000
Energy flow in an ecosystem begins with
A. autotrophs. B. detritivores. C. carnivores. D. omnivores. E. herbivores.