AnswersCA-Life Science B High SchoolRelationships Among Organisms

Relationships Among Organisms Answers

0 verified answers1 views
1
Free Preview

As human travel increases, the number of introduced species likely

A
decreases.
B
increases.
C
stays the same.
D
is eliminated.
2
Free Preview

Legumes, a type of plant, require Rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen. Rhizobia use the legumes for food. What would most likely happen to the legume population if Rhizobia suddenly became extinct?

A
become extinct
B
learn to fix nitrogen
C
benefit in the long run
D
stay the same
3

Why are invasive species dangerous to the environment?

A
They pollute the environment.
B
They are always predators.
C
They threaten biodiversity.
D
They bring abiotic factors.
4

Which type of symbiotic relationship is described in the following scenario?Termites are unable to digest some plant materials (fiber). Termite stomachs contain bacteria that digest the fiber in wood for the termites. In turn, the bacteria are provided with a hospitable environment to carry out their life processes.

A
commensalism
B
mutualism
C
parasitism
D
competition
5

What is the name that is given to a symbiotic relationship in which both species benefit?

A
commensalism
B
mutualism
C
parasitism
D
predation
6

The cane toad, or Rhinella marina, was introduced to the Hawaiian Islands in 1932 by sugar cane farmers. The farmers released the toads in their crops to help control pests that were damaging the sugar cane. The cane toad has few natural predators because it secretes a poisonous toxin that kills the animals that consume it. As a result, the cane toad population thrived, and by 1935, it numbered hundreds of thousands. Which role does the cane toad play in the Hawaiian Islands?

A
native species
B
invasive species
C
reintroduced species
D
endangered species
7

A relationship in which one species kills and consumes another species is known as

A
predation.
B
parasitism.
C
commensalism.
D
mutualism.
8

Bears and salmon have a predator-prey relationship. What would most likely happen to the bear population if the salmon population increased?

A
stay the same
B
decrease
C
increase
D
become extinct
9

The pine borer beetle is a parasite to the pine tree. What would most likely happen to the pine tree population if the beetle population decreased?

A
decrease
B
increase
C
become extinct
D
stay the same
10

When an insect touches the bristles on the lobes of a Venus flytrap, the lobes close quickly, engulfing the insect. The movement of the insect inside the lobes causes the flytrap to secrete digestive enzymes that kill the insect. Which type of relationship does this describe?

A
competition
B
parasitism
C
predation
D
commensalism

Did you find these answers helpful?