Based on current growth rates, Earth's human population in 2019 will be closest toa. 2.5 million.b. 4.5 billion.c. 7.5 billion.d. 10.5 billion.

A population growing exponentially .a. is stable in size;b. adds a fixed number of individuals every generation;c. adds a larger number of individuals in each successive generation;d. will likely expand forever;e. will not crash

Analyzing ecological footprints reveals thata. Earth's carrying capacity would increase if per capita meat consumption increased.b. current demand by industrialized countries for resources is much smaller than the ecological footprint of those countries.c. it is not possible for technological improvements to increase Earth's carrying capacity for humans.d. the ecological footprint of the United States is large because per capita resource use is high.

To figure out the human population density of your community, you would need to know the number of people living there anda. the land area in which they live.b. the birth rate of the population.c. the dispersion pattern of the population.d. the carrying capacity.

Why is there a trade-off between survivorship and fecundity?

The term (K−N)/Ka. is the carrying capacity for a population.b. is greatest when K is very large.c. is zero when population size equals carrying capacity.d. increases in value as N approaches K.

Which of the following species is most likely to have a Type III survivorship curve?a. humans, Homo sapiensb. common lizards, Zootoca viviparac. thale cress plants, Arabidopsis thalianad. lynx cats, Lynx canadensis

According to the graph shown here, the carrying capacity for fruit flies in the environment of the culture bottle is .a. 0 flies;b. 100 flies;c. 150 flies;d. between 100 and 150 flies;e. impossible to determine

The observation that members of a population are uniformly distributed suggests thata. resources are distributed unevenly.b. the members of the population are competing for access to a resource.c.the members of the population are neither attracted to nor repelled by one another.d. the density of the population is low.