Help on ecology test...?

Question

1. Cattle egrets are birds that mostly feed on insects that have been disturbed by grazing cattle. The cattle are neither helped nor harmed by the presence of the egrets. This relationship is an example of
a. mutualism
b. commensalism
c. competition
d. parasitism

2. "the dog provides nutrients and shelter for the tapeworm living in its intestines"....the relatioship is
a. mutualism
b. competition
c. parasitism
d. commensalism

3. "The cow eats grass. The sheep eats the same grass." The relatioship is
a. competition.
b. commensalism
c. mutualism
d. parasitism

4. Secondary Succession occurs
a. after a new food web is established
b. as a previously existing community is replaced
c. as on generation of organisms replaces the previous one
d. all of the above.

5. Which of the following is not a characteristic of pioneer species...(first of all, what are their characteristics? my teacher didn't tell us). They..
a. Reproduce slowly
b. disperse many seeds
c. grow quickly
d. are small

Answer 1

So, mutualism is a case where both parties in a relationship provide benefits to each other; parasitism is a case where one party gains from a relationship at the expense of the other; competition, of course, is pretty self-evident. That should give you a sporting chance! Now as to 'pioneer species'; what would you expect them to be - the things that first colonize an opened area, right? Like weeds that first appear in a plowed field, or a burned-over area. What sort of characteristics would you expect such kinds of organisms to have? Think about what it would take to get there first and fill up the area fast...

Answer 2

Why do you think of that greater advantageous type in a nutrients internet ability greater advantageous stability in an atmosphere? - because of the fact with greater techniques the buyer has a improved danger to capture nutrients to stay. How does a predator inhabitants help a prey inhabitants? It facilitates the prey inhabitants from over populating. checklist 3 approaches that carbon dioxide returns to the ambience. After bacterias launch them returned after ingesting up those ineffective animals. once you burn energy, and exhale, CO comes out. whilst CO is dug from decrease than the floor after some years.