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Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
A ______ is a change in the rate of random movement in response to a specific stimulus.
- a. epigenetic trait
- b. taxis
- c. kinesis
- d. migration
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.
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...
Chapter 43 Solutions
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