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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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_________ removes webs between developing digits.

  1. a. Gastrulation
  2. b. Cleavage
  3. c. Apoptosis
  4. d. Implantation

Summary Introduction

Concept introduction: Apoptosis is where cells are programmed to die. Apoptosis occurs during two conditions: when the cells age and during development.

Explanation

Reason for the correct answer:

During development, certain cells are programmed to die as they are not further required during the development process by activating the apoptotic genes in the respective cells. An example is human limb development. The embryonic stages have webbed hands and feet; as development continues, the webbing between the digits is removed by inter-digital apoptosis.

Option c. is given as “Apoptosis” and since apoptosis helps to remove the inter-digital web, the correct answer is option c.

Reasons for the incorrect answers:

Option a. is given as, “Gastrulation”.

Gastrulation is the phenomenon where blastula develops into gastrula...

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