10.
Which of the following are detritivores?
A) worms
B) vultures
C) fungi
D) All of the above
16.
Biomes characterized by high annual rainfalls are located at high elevations.
A) True
B) False
20.
The most likely reason there are few large trees in the tundra is because
A) they are grazed by bison.
B) permafrost restricts root development.
C) the soil is nutrient-poor.
D) the average temperature is too warm.
34.
The caterpillars of cabbage butterflies are the only insects that can eat plants of the mustard family because they
A) eat these plants only when young and tender.
B) have evolved the ability to break down mustard oils into harmless chemicals.
C) are parasites while in this stage of development.
D) All of the above
35.
If the niches of two organisms overlap,
A) the organisms may have to compete directly.
B) the two organisms will always form a symbiotic relationship.
C) both organisms will disappear from the habitat.
D) one organism usually migrates to a new habitat.
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Posted on December 21, 2010.
10.D–All of the above.
16.B–False
20.B–Permafrost restricts root development
34.D–All of the above
35.A–The organisms may have to compete directly
I don’t like giving students the answers to tests without them thinking or learning, so here are the key facts you need to know. You should be able to easily apply them.
10) detrivores eat dead things that are decomposing,
16) High elevations tend to be associated with LOW rainfalls because the cold air in mountains can not hold much moisture.
20) Permafrost (a layer of ice just a few feet down) It will prevent roots from growing deep.
34) Mustard oils are a natural pesticide that kill most insects quickly.
35) A niche is something that an organism wants and needs to survive, like a type of food, or home. If a lion and a pack of hyenas both come across a dead antelope, what will they do if there is no other food around? Compete, share, both die, one will run away and starve?