- Desert
mistletoe is a shrub plant that produces red berries, which are eaten by
birds. The hard seeds in the fruit then pass through the bird and are left
on the branch of a tree to grow.
There, the mistletoe can sprout and grow its roots inside of a host
tree, where it steals water and nutrients from the tree through its
roots. Which of the following best
describes the relationships that mistletoe has with these two organisms,
the bird and the tree?
a.
mutualism with the bird; mutualism with the tree
b.
mutualism with the bird; parasitism with the tree
c.
commensalism with the bird; mutualism with the three
d.
parasitism with the bird; parasitism with the tree
- In the
1930s, farmers brought a plant species called buffelgrass from South
Africa to the southwestern United States. They did so to reduce erosion
rates and provide food for livestock. buffelgrass thrived and spread
throughout the southwest, particularly in Arizona. How is the relationship
between buffelgrass and other plant species best categorized?
a. native –
non-native b.
parasitism
c. commensalisms d. predator-prey
- In a
desert environment, cactus wrens often build their nests in cholla cactus
to avoid predators. This behavior does not hurt the cactus. Which type of
relationship do cactus wrens and cholla cactus demonstrate?
a. native –
non-native b.
parasitism
c. commensalism d. competition
e. mutualism
- Although
Hyenas are shown in movies as cowards, they are actually ferocious
hunters. Lions often wait for hyenas to kill their prey, such as zebra,
and then scare them off and claim the zebra for themselves. What
relationship is this an example of?
a. native –
non-native b.
parasitism
c. commensalisms d. competition
e. mutualism
- On your
answer sheet come up with your own example of a symbiotic relationship.
Label the type of relationship and the organisms involved.
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