Salmon Fish Hatcheries Add a Harmless Perfume (Morpholine)to a Stream

question 3

Multiple Choice

Salmon fish hatcheries add a harmless perfume (morpholine) to a stream when they release young fish.When the fish mature,they attract them back to the home stream by using this chemical (in nature the fish smell the unique odors of soil and trees along the home stream) .In effect,the hatchery biologist is using

• A)the fish's inborn instincts to relocate its own stream.
• B)a fish's higher order reasoning.
• C)an experiment based on the ability of fish to learn by trial and error.
• D)chemotropisms.
• E)imprinting.

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Definitions:

Dialysis Tubing

A semi-permeable membrane tube used in separation techniques that facilitates the exchange of substances between the tube and the surrounding fluid.

Leukocyte

Leukocytes, also known as white blood cells, are cells of the immune system involved in protecting the body against both infectious disease and foreign invaders.

Erythrocyte

A red blood cell, which is responsible for carrying oxygen from the lungs to the body's tissues and carbon dioxide as a waste product back to the lungs.

Parietal Layer

The outer layer of the membranes surrounding organs within body cavities, particularly in the pleura, pericardium, and peritoneum.