Answers5120VA Environmental Science Sem ACareers in Environmental Science

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How can an increase in biodiversity lead to an increase in ecosystem stability?

A
A more biodiverse ecosystem is not subject to change.
B
A more biodiverse ecosystem has a higher chance of adapting to species changes.
C
A more biodiverse ecosystem has fewer species types to balance.
D
A more biodiverse ecosystem is subject to fewer natural disasters.
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Many dogs bark when unknown individuals approach their house. What type of interaction is this?

A
Mutualism
B
Predation
C
Symbiosis
D
Competition
43

Gila Monsters are one of two types of venomous lizards in the world. If you wanted to avoid coming across the Gila Monster when hiking in Arizona you would want to avoid __________ and __________ because Gila Monsters are crepuscular.

A
midnight and midday
B
dawn and dusk
C
noon and high dusk
D
later morning and early afternoon
44

The principle characteristic distinguishing marine and freshwater ecosystems is _______.

A
temperature
B
presence of corals
C
presence of fish
D
dissolved salt
45

Consider the following food chain: Plants are eaten by grasshoppers, which are eaten by mice, which are eaten by snakes. What will happen to snakes in the long term if mice become extinct?

A
The number of snakes will increase temporarily, and then decrease.
B
The number of snakes will decrease permanently, but they will not die out completely.
C
The number of snakes will decrease temporarily and then increase.
D
Snakes will die out if they do not find an alternative food source.

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