apes quiz chapter 4

which of the following would likely reduce threats posed by exotic species to native species? I. Increasing inspections of goods coming into a country II. Mandating tht bligewater from vessels be emptied in ports instead of in the open ocean III. Enforcing legislation that restricts imported materials such as untreated wooden packing crates

I and II only

interspecific competition can be avoided by

all of these answers

you study fossils of giraffes. although there appears to be considerable variability in lengths of necks, there appears to be a definite shift to longer necks over the course of time. you conclude that this species is undergoing

directional natural selection

which of the following can be used to assess the biological diversity of an area?

genetic variation within each species and number of species present

species that serve as early warnings of environmental damage are called

indicator species

which of the following best describes a symbiotic relationship?

intestinal bacteria inhabit the gut of humans

which of the following statements is true?

predation exerts a selective force on the prey, favoring characteristics that reduce the probability of capture

what does richness refer to?

the number of different species

all of the following statements about invasive exotic species are true EXCEPT:

they tend to have low reproductive rates