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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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Which of the following is an example of taxis?

  1. a. An earthworm moves away from light.
  2. b. Each spring, a bird travels hundreds of miles to its breeding grounds.
  3. c. A honeybee emits a pheromone that induces other bees to defend the hive.
  4. d. An increase in temperature increases the speed at which a butterfly flies.

Summary Introduction

Concept introduction: All the organisms can move from one place to another when they are in need for food or shelter. Some animals migrate to other places during the seasonal change toward a breeding site. This migration and the navigation of animals occur through the stimulus response. Taxis is the innate directional response of an animal that makes it move toward or away from the stimulus source.

Explanation

Reasons for correct statements:

Taxes is the movement of organism in response to the stimulus such as light or presence of food which is a kind of innate behavioral response.

Option a. is given as “An earthworm moves away from light”. Planarians are destructively phototactic and completely geotactic. Hence, option a. is the correct answer.

Reasons for the incorrect statements:

Option b. is given as “Each spring, a bird travels hundreds of miles to its breeding grounds.” Among the given statements, this is not an example for taxis...

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