Chapter 9. 9·17–9·18 Communication and the design of signals evolve.

Show What You Know - Self Quiz

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You must read each slide, and complete any questions on the slide, in sequence.

Instructions

Check your understanding of concepts from 9·17–9·18 Communication and the design of signals evolve by answering the following questions.

1.

1. Which of the following is NOT typically a form of animal communication?

release of airborne hormones

increased heart rate and metabolic rate

posture

vocalizing

baring one’s teeth

Correct. (See section 9·17 Animal communication and language abilities evolve.)

Incorrect. (See section 9·17 Animal communication and language abilities evolve.)

2.

2. Evolution would tend to favor:

greater clarity and unambiguous communication.

decreasing sophistication of communication signals.

always honest communication.

always deceptive communication.

None of the above is correct.

Correct. (See section 9·18 Honest signals reduce deception.)

Incorrect. (See section 9·18 Honest signals reduce deception.)

3.

3. Under what conditions would an allele increase in a population?

The allele leads to honest behavior that decreases individual fitness.

The allele increases the fitness of the population but not the individual.

The allele causes easily “faked” behavior.

The allele leads to deceptive behavior that increases individual fitness.

The allele decreases the clarity of a communicative behavior.

Correct. (See section 9·18 Honest signals reduce deception.)

Incorrect. (See section 9·18 Honest signals reduce deception.)

4.

4. ________ is an action or signal on the part of one organism that alters the behavior of another organism.

Maturation

Communication

Courtship

Visualization

Language

Correct. (See section 9·17 Animal communication and language abilities evolve.)

Incorrect. (See section 9·17 Animal communication and language abilities evolve.)

5.

5. Molecules released by an individual into the environment that trigger behavioral responses in other individuals are called:

glycoproteins.

pheromones.

phospholipids.

language.

alarm signals.

Correct. (See section 9·17 Animal communication and language abilities evolve.)

Incorrect. (See section 9·17 Animal communication and language abilities evolve.)

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