chap 53 (2)

Question 1

toxic wastes

Answer 1

contributes to density-dependent regulation of population size

Question 2

predation

Answer 2

as a prey population builds up, predators may feed preferentially on that species

Question 3

intrinsic factors

Answer 3

for some populations, intrinsic (physiological) factors appear to regulate population sizes

Question 4

territoriality

Answer 4

in many vertebrates and some invertebrates, competition for territory may limit density

Question 5

disease

Answer 5

population density can influence the health and survival of organisms. pathogens can spread more rapidly

Question 6

population dynamics

Answer 6

focuses on the complex interactions between biotic and abiotic factors that cause variation in population size

Question 7

metapopulations

Answer 7

groups of populations linked by immigration and emigration