RENR Chapter 17 Final Practice – Revision Questions and Study Guide
Symbiosis can include which of the following?
a. mutually beneficial intimate interactions between two different species
b. intimate interactions between two species that are beneficial to one partner and detrimental
to the other
c. intimate interactions between two species where one species obtains a benefit and the other
is unaffected
d. A and B
e. A and C
f. B and C
g. A, B, and C - correct answer ✔✔A, B, and C
If Rhizobium bacteria were to go extinct, plants would
a. not be able to obtain atmospheric nitrogen.
b. be more damaged by herbivory.
c. not be able to obtain energy from photosynthesis.
d. not be able to survive drought. - correct answer ✔✔a. not be able to obtain atmospheric
nitrogen.
When two species have evolved a mutualistic relationship, if one species begins to provide less
of a benefit, we predict that the other species will
a. evolve to provide more of a benefit.
b. not change the benefit it provides.
, c. evolve to provide less of a benefit.
d. increase its population size. - correct answer ✔✔c. evolve to provide less of a benefit.
A species that interacts with many other species is a
a. specialist
b. parasite
c. generalist
d. mutualist - correct answer ✔✔c. generalist
You are studying a plant species that has a fungus growing in its roots. You remove the fungus
and evaluate what happens to the plant. Which outcome indicates a mutualistic relationship?
a. The plant becomes toxic to herbivores.
b. There is no change in the toxicity of the plant.
c. The plant becomes less toxic to herbivores.
d. The plant can acquire atmospheric nitrogen. - correct answer ✔✔c. The plant becomes less
toxic to herbivores.
What benefit do Rhizobium bacteria provide to plants that plants cannot provide for
themselves?
a. a place to live
b. products of photosynthesis
c. conversion of atmospheric nitrogen to a form that plants can use
d. protection from herbivorous mammals - correct answer ✔✔c. conversion of atmospheric
nitrogen to a form that plants can use
Symbiosis can include which of the following?
a. mutually beneficial intimate interactions between two different species
b. intimate interactions between two species that are beneficial to one partner and detrimental
to the other
c. intimate interactions between two species where one species obtains a benefit and the other
is unaffected
d. A and B
e. A and C
f. B and C
g. A, B, and C - correct answer ✔✔A, B, and C
If Rhizobium bacteria were to go extinct, plants would
a. not be able to obtain atmospheric nitrogen.
b. be more damaged by herbivory.
c. not be able to obtain energy from photosynthesis.
d. not be able to survive drought. - correct answer ✔✔a. not be able to obtain atmospheric
nitrogen.
When two species have evolved a mutualistic relationship, if one species begins to provide less
of a benefit, we predict that the other species will
a. evolve to provide more of a benefit.
b. not change the benefit it provides.
, c. evolve to provide less of a benefit.
d. increase its population size. - correct answer ✔✔c. evolve to provide less of a benefit.
A species that interacts with many other species is a
a. specialist
b. parasite
c. generalist
d. mutualist - correct answer ✔✔c. generalist
You are studying a plant species that has a fungus growing in its roots. You remove the fungus
and evaluate what happens to the plant. Which outcome indicates a mutualistic relationship?
a. The plant becomes toxic to herbivores.
b. There is no change in the toxicity of the plant.
c. The plant becomes less toxic to herbivores.
d. The plant can acquire atmospheric nitrogen. - correct answer ✔✔c. The plant becomes less
toxic to herbivores.
What benefit do Rhizobium bacteria provide to plants that plants cannot provide for
themselves?
a. a place to live
b. products of photosynthesis
c. conversion of atmospheric nitrogen to a form that plants can use
d. protection from herbivorous mammals - correct answer ✔✔c. conversion of atmospheric
nitrogen to a form that plants can use
