Unit 1 Chapter 28 Flashcards
(16 cards)
A herd of wild bison living in Yellowstone National Park is an example of a(n) \_\_\_\_\_\_. a. species b. population c. community ecosystem
b
The bison, grizzly bear, moose, bighorn sheep, boreal toad, sandhill crane, monkeyflower, and prickly pear cactus living in Yellowstone Park are an example of a(n) \_\_\_\_\_\_. a. species b. population c. community ecosystem
c
What kind of competition occurs between two different species in a community? a. Intraspecific competition b. Interspecific competition c. Scramble competition Contest competition
b
Horses are herbivores that eat grass, which is hard to break down because it contains silicon. Horses have evolved the kind of teeth they need to chew grass. This relationship is an example of \_\_\_\_\_\_. a. symbiosis b. mutualism c. coevolution mutation
c
Why don’t two species occupy the exact same ecological niche?
a. Most species are territorial and cannot share the same habitat.
b. The species are coevolving and are changing to reduce competition.
c. Natural selection favors organisms with fewer competitors.
The genes of organisms vary too greatly for them to share the same ecological niche.
c
Based on the competitive exclusion principle, what would happen if two organisms shared the same or almost the same niche?
a. Both would share a larger niche than they would alone.
b. Both would share a smaller niche than they would alone.
c. The less adjusted species would struggle and eventually die out.
One would change habitats to completely eliminate competition
c
How do species with similar requirements coexist?
a. Each encompasses a larger niche than they do when alone.
b. Each encompasses a smaller niche than they do when alone.
c. One outcompetes the other and the lesser adapted species dies off.
Both become extinct
b
If two species of reef fish eat the same species of anemone, what will happen to the size of each reef fish population?
a. One will outcompete the other one.
b. Each may not be as widely distributed and as large as they would be without this competition.
c. Each will be more widely distributed due to having to go beyond their normal niche to attain more resources.
One will go extinct
b
The sand dab blends in with the sandy bottom of the ocean to conceal itself from its predators and prey. This is an example of \_\_\_\_\_\_\_. a. commensalism b. warning coloration c. mimicry camouflage
d
Why is the poison arrow frog brightly colored in a forest that is mainly green?
a. To warn predators that it is poisonous
b. To signal to the opposite sex that it is ready to mate
c. To designate its territory
To warn prey that it is a fierce predator
a
On a reef, cleaner wrasse will set up a cleaning station where larger fish will line up to have the wrasses gently pick off dead skin and parasites. The sabertooth blenny, which looks almost exactly like the wrasses, will bite off chunks of flesh, or even eyeballs, of the fish being serviced. This is an example of \_\_\_\_\_\_. a. commensalism b. warning coloration c. mutualism mimicry
d
A blob-shaped frogfish sits perfectly still on a reef. It is waiting for its prey to lunge for the bait dangling from a fishing pole off its forehead. This is an example of \_\_\_\_\_\_. a. commensalism b. warning coloration c. Batesian mimicry aggressive mimicry
d
Big black spots on the tail of a moth or a snake head caterpillar are used to ______.
a. provide camouflage to hide from predators and enable sneak attacks on prey
b. trick predators into thinking it has larger eyes than it really does and is thus larger in size
c. signify poisonous or distasteful content
alert the opposite sex it is ready to mate
b
Elephants in a rain forest clear out new growth from a gap created when a large tree falls. The nutrient-rich elephant feces help establish a heartier species of plant in this clearing. The elephants play the role of the \_\_\_\_\_\_. a. host b. parasite c. keystone species disturbance
c
Why does a natural disturbance favor the process of succession?
a. It kills off all of the invasive species, leaving only native species.
b. It allows for secondary succession to occur because the seeds that are left behind colonize quickly.
c. It often leaves behind favorable conditions that allow for the rapid growth of new species.
It saves the climax community and destroys the less evolved species.
c
A climax community will have \_\_\_\_\_\_\_\_\_\_ community interactions than a community undergoing secondary succession. a. more b. about the same c. fewer far fewer
a
