Match the definitions on the left with the vocabulary words on the right. The level of diversity within a given species The number of different species within a specific region or area The variety of ecosystems in a given region or area the degree to which different species in a given ecosystem, or area, depend on other species in that area for survival ::species interdependence :: ecosystem diversity genetic diversity species diversity

The type of place where a species typically lives is called its _______. a. niche c. community b. habitat d. population

Figure 45.10b If the major food source of the seals declines due to pollution or overfishing, which of the following would likely occur? The carrying capacity of seals would decrease, as would the seal population. The carrying capacity of seals would decrease, but the seal population would remain the same. The number of seal deaths would increase but the number of births would also increase, so the population size would remain the same. The carrying capacity of seals would remain the same, but the population of seals would decrease.

The number of currently described species on the planet is about ________. a. 17,000 b. 150,000 c. 1.5 million d. 10 million

The type of physical environment in which a species typically lives is its _______. a. niche b. habitat c. community d. population

Figure 19.6 If the major food source of seals declines due to pollution or overfishing, which of the following would likely occur? a. The carrying capacity of seals would decrease, as would the seal population. b. The carrying capacity of seals would decrease, but the seal population would remain the same. c. The number of seal deaths would increase, but the number of births would also increase, so the population size would remain the same. d. The carrying capacity of seals would remain the same, but the population of seals would decrease.

Why are studies of ecosystems more inclusive than studies of populations?

Population _______________ is the number of individuals of a species per unit of habitat area or volume at a given time. (a) dispersion (b) density (c) survivorship (d) age structure (e) demographics

Figure 18.23 Which of the following statements is false? Punctuated equilibrium is most likely to occur in a small population that experiences a rapid change in its environment. Punctuated equilibrium is most likely to occur in a large population that lives in a stable climate. Gradual speciation is most likely to occur in species that live in a stable climate. Gradual speciation and punctuated equilibrium both result in the evolution of new species.

The number of species on an island depends on the size of the island and its distance from a mainland. This statement would most likely be made by _____. a. an explorer b. a biogeographer c. a geologist d. a philosopher