The American eel is born is born in the Sargasso Sea

The American eel is born is born in the Sargasso Sea, moves to rivers as far inland as Oklahoma, and then returns to the Sargass Sea to breed. It has a ___ life cycle.

complex

catadromous

amphidromous

anadromous

1 points  

Multiple Choice: The clownfish transitions from male to female based on its surroundings. It is an example of

Simultaneous hermaphroditism.

Protogyny

Protoandy

Monoecious

Multiple Choice: Which survivorship curve best describes most marine organisms (few adults produce large number of eggs and larvae)?

Type I

Type II

Type III

None of the above

1 points  

Multiple Choice: Herds of elephants spread across a savanna is an example of what kind of dispersion?

uniform

clumped

scattered

random

1 points  

Which of the following methods would work best to estimate flower species diversity?

distribution mapping

Lincoln Peterson index

quadrats

mark-recapture

1 points  

Which of the following sampling techniques represents an index of abundance rather than an estimate of density?

ratio of marked and unmarked mice in a field

density of oak trees within a quadrat

number of duck calls captured  by microphones

number of bears observed along transects

1 points  

Of the following, which is mostly likely to be related to an Allee effect?

breakdown of breeding behaviors

increased access to resources

un-controllable growth

changes in maturation rates

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