Which one of the following expressions from the logistic equation (dN/dt = rN ((K - N)/K) represents the proportion of unused resources remaining for use by the population?
A. the carrying capacity (K)
B. the population size (N)
C. the biotic potential (rN)
D. (K - N)/K
E. the growth rate (dN/dt)
D. (K - N)/K
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Which biome occurs where winter drought reduces photosynthesis and most trees drop their leaves?
a. tropical montane forests b. tropical deciduous forests c. boreal forests d. dry savannas e. temperate forests
Which is an example of an organ that is nervous in origin, structure, and function but secretes
substances into the bloodstream? a. anterior pituitary b. posterior pituitary c. pancreas d. adrenal cortex e. testis
Which of the following statements about alcohol is false?
a. Alcohol abuse is responsible for more than 30% of all traffic fatalities. b. A typical 170lb male can reach the legal level of intoxication by consuming four drinks in one hour. c. Nearly one of every three high school students experiences negative consequences from alcohol use. d. Coffee can be used to counteract the drowsiness and depressive effects of alcohol consumption. e. Fetal alcohol syndrome is the leading cause of preventable mental retardation in the United States.
Energy transformations are not 100% efficient. Often, energy is released in the form of ________, which is in agreement with the second law of thermodynamics
Fill in the blank(s) with correct word