Course

Animal Biology

Study Pack

Set 28 Water And Salt Physiology Of Animals In Their Envir

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Question 1

(Multiple Choice)

Free
Why have scientists never found European eel eggs or hatchlings in their European freshwater habitats?

A) Larvae do not emerge from buried mud until almost fully grown.
B) Eggs are buried and develop on moist land.
C) Spawning takes place in the west North Atlantic Ocean.
D) Young are developed internally and only released from the mother when close to fully grown.

Answer

Question 2

(Multiple Choice)

Free
In terms of its lifecycle, the European eel is classified as

A) anadromous.
B) catadromous.
C) hyperosmotic.
D) hyposmotic.

Answer

Question 3

(Multiple Choice)

Free
Why is the European eel classified as catadromous?

A) It is hyperosmotic to freshwater.
B) It is hyposmostic to seawater.
C) It migrates to the ocean to spawn.
D) It migrates to freshwater to spawn.

Answer