Exam 15: Parasitism and Mutualism

Discuss the differences between direct and indirect transmission of a parasite.

Pre-agricultural humans were mostly bothered by ________ parasites.

A host species that harbors only a developmental phase of a parasite is called a(n)

Microparasites are relatively small, including organisms such as flatworms, flukes, lice, fleas, and ticks.

Use an example to illustrate the fact that parasites can impact both the survival and reproduction of their hosts.

Parasites that live within their host rather than on the skin are referred to as ________-parasites.

Plants do not benefit from insects that prey on their nectar.

The killing of raccoons through a distemper outbreak represents a ________ response.

Plants often react to attacks on the leaf, stem, fruit, or seed by forming abnormal structures called ________.

Plant parasites that are photosynthetic but draw water and nutrients from their host plant are referred to as

The ________ host is a host species that harbors a developmental stage of a parasite, but in which the parasite does not reach maturity.

In a ________ mutualism, an animal transfers pollen from one plant to another in exchange for some reward such as nectar.

________ is the intimate and protracted association between two or more organisms of different species.

The relationship between ants and acacias represents a pollination mutualism.

________ transmission is the transfer of a parasite from one host to another without the involvement of an intermediate organism.

Which of the following is an ectoparasite?

Parasites may regulate host populations.

The outcome of an infection is called a(n)________.

A species that interacts with many other species rather than only a few, such as a nectivore that gathers nectar from many plant species, is called a ________.

A(n)________ is an intermediate organism that aids the spread of a parasite from one host to another.