Species Interactions

Predator-prey relationships often result in evolution of capture & avoidance mechanisms

• True

• False

Skunks, which are noted for their ability to spray would-be predators with foul smelling
chemical, typically have a coat that is mostly black with contrasting white stripes or spots.
Their color pattern is an example of

• crypsis

• camoflodge

• mimicry

• aposematism

• homotypy

Which of the following type of interaction would be least likely to lead to coevolution of the
interacting species?

• Mutualistic

• Parasite-host

• Predator-prey

• Commensal

• Plant-herbivore

Which of the following is a possible outcome of competition involving two species?

• Some individuals of both species experience reduced growth and reproductive rates.

• One species excludes the other from habitat it would occupy in the absence of competition.

• One species restricts the geographic range of the other species.

• The species evolve to divide up the limiting resource and continue to coexist in the same locality.

• All of the above.

Which of the following statements about ectoparasites is false?

• Many ectoparasites have evolved adaptations to keep them attached to their hosts.

• Some ectoparasites have a relatively brief or casual association with their hosts.

• Most ectoparasitic insects are highly specialized sometimes feeding on only a single host species.

• Many ectoparasitic insects have developed wings during the course of their evolution.

• All of the above are true; none is false.

Which of the following statements about the niche concept is false?

• Compared with species with dissimilar niches, species with similar niches are likely to be stronger.

• Competitors with one another.
  Two species can occupy the same habitat but have different niches.

• The fundamental niche is defined by interaction between species.

• The realized niche of a species is never larger than its fundamental niche, though they may be identical
  in size.

Certain birds follow swarms of foraging ants, and prey upon the insects the ants flush out
and also eat. The relationship between these birds and the ants is an example of

• competition

• commensalism

• mutualism

• amensalism

• both 1st and 2nd answers are correct

______ is a trophic interaction in which one species (predator) consumes at least part of
another species (prey).

• predation

• resource partitioning

• competition

• amensalism

• mutualism

Which of the following is not true of competition?

• The two species are allopatrically distributed.

• It is a non-trophic interaction.

• When two or more species require some of the same limited resources.

• It negatively impacts growth, survival, and reproduction of all involved.

A bird eats the fruit of a plant species. The seeds are not digested and are voided at some
distance from the parent plant, where they then germinate. This is an example of

• predation

• mutualism

• commensalism

• competition

• amensalism