The demographic age pyramid of a rapidly growing populations is _____ A) wide at

Question

The demographic age pyramid of a rapidly growing populations is _____ A) wide at the base, narrow at the top B) wide at the top, narrow at the bottom. C) similarly wide from top to bottom. D) wide at top and bottom, narrow in the middle. The movement of individuals in space is called _____. A) distribution. B) migration C) dispersal. D) density The form of competition in which growth and reproduction are depressed equally across individuals in a population as the intensity of competition increases is called _____. A) scramble competition. B) exploitation competition C) contest competition D) interference competition. Hummingbirds are attracted to red flowers with long tubes. What might you predict would happen to flowers if hummingbirds become the predominant species on a remote island? A) Flowers would become gradually more red. B) Flowers would develop shorter tubes. C) Hummingbirds would develop longer beaks. D) Hummingbirds would become extinct. A population that is increasing in size has an intrinsic rate of population growth (r) that is _____ A) 0 D) > 1. When the conditions are favorable for a population at low density, such as when a species colonizes a new environment, population growth is typically. _____ A) exponential B) logistic C) tangential D) dynamic. qx (the age-specific mortality rate) + _____ A) n_x/d_x B) n_x/l_x C) d_x/n_x D) T)x/n_x Heightened male to male aggression around female mates is likely the result of _____ A) intersexual selection. B) intersexual selection. C) polygamy. D) delayed sexual maturity. Which statement about stress is incorrect? A) Stress increases as population density increases. B) Stress may trigger the release of specific chemical signals or pheromones. C) Stress can stimulate growth and increase the rate of reproduction. D) Stress may result in increased vulnerability to disease. A group of local subpopulations is called a(n) _____. A) community B) species C) metapopulation. D) ecogroup. Which of the following represents a modular organism ? A) lizard B) coral C) dog D) ant The process whereby one species gives rise to several others that exploit different features of the environment is known as _____ A) exponential growth. B) convolution. C) adaptive radiation. D) competition. A sexual system where a male gorilla mates with several females, forming pair bonds with each of them, is called _____. A) promiscuity. B) monogamy. C) polyandry D) polygyny.

Explanation / Answer

47) A) wide at the base, narrow at the top.

48) C) dispersal.

49) A) scramble competition

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