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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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A ______ is a change in the rate of random movement in response to a specific stimulus.

  1. a. epigenetic trait
  2. b. taxis
  3. c. kinesis
  4. d. migration

Summary Introduction

Concept introduction: A stimulus is the agent that directly influences the activity of a living organism or one of its parts of living protoplasm. It is a change in surroundings of an organism that causes the organism to change its behavior. This, in turn makes the environment more satisfactory. Some animals migrate seasonally, and navigating to a specific site requires a mental cap and an ability to determine the correct direction and the movement of the organisms occur.

Explanation

Reasons for correct statements:

Innate responses to a specific stimuli influence the rate or direction for the animal movement. This can occur in random or in a uniform manner.

Option c is given as “kinesis”. Kinesis is an instinctual response from stimulus that causes an animal to increase or decrease its movements in a random manner. It is an innate response that determines the animal’s movement in reaction to a stimulus. Hence, the option c. is correct answer.

Reasons for incorrect statement:

Option a. is given as “epigenetic trait”. It is an inherited phenotypic trait resulting from changes in a chromosome without alterations in the DNA sequences...

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