Explain why biologists want to maintain (a) 'habitat corridors' that connect populations in a metapopulation, and (b) unoccupied habitat that is appropriate for the species in question.

All of the following are density-dependent factors that can influence population size except .a. weather;b. food supply;c. waste concentration in the environment;d. infectious disease;e. supply of suitable habitat for survival

In contrast to nonhuman populations, human population growth rates have begun to decline due to .a. voluntarily increasing death rates;b. voluntarily decreasing birth rates;c. involuntary increases in death rates;d. involuntary decreases in birth rates;e. density-dependent factors

According to the logistic growth equationdNdt=rN(K−N)Ka. the number of individuals added per unit time is greatest when N is close to zero.b. the per capita population growth rate increases as N approaches K.c. population growth is zero when N equals K.d. the population grows exponentially when K is small.

Which of the following represents a demographic transition?a. A population switches from exponential to logistic growth.b. A population reaches a fertility rate of zero.c. There are equal numbers of individuals in all age-groups.d. A population switches from high birth and death rates to low birth and death rates.

Populations that rely on stored resources are likely to overshoot the carrying capacity of the environment and consequently experience a(n) .a. demographic momentum;b. cultural carrying capacity;c. decrease in death rates;d. population crash;e. exponential growth

During exponential growth, a population alwaysa. has a constant per capita population growth rate.b. quickly reaches its carrying capacity.c. cycles through time.d. loses some individuals to emigration.

Skyrocketing growth of the human population appears to be mainly a result ofa. a drop in death rate due to sanitation and health care.b. better nutrition boosting the birth rate.c. the concentration of humans in cities.d. social changes that make it desirable to have more children.

Indicate what is correct and incorrect about this statement: If lizards want to survive during climate change, they can evolve new life-history traits.