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Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : In the morula stage, cells divide without increases in size.
Reason : Zona pellucida remain undivided till cleavage is complete.
- a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- c)Assertion (A) is true but reason (R) is false.
- d)Assertion (A) is false but reason (R) is true.
- e)Both Assertion and Reason are false.
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Directions: In the following questions, a statement of assertion (A) ...
Morula is an early stage of embryo development consisting of cells called as blastomeres in a solid ball contained within the zona pellucida. A morula is distinct from a blastocyst in that a morula (3-4 days post fertilization) is an 8 cell mass in a spherical shape. Cells divide in this stage without increase in size.
Zona pellucida which covers morula remain undivided till cleavage is complete.
Therefore, the correct answer is option B.
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Community Answer
Directions: In the following questions, a statement of assertion (A) ...
Assertion: In the morula stage, cells divide without increases in size.
Reason: Zona pellucida remains undivided till cleavage is complete.
Explanation:
- The morula stage is an early stage of embryonic development, characterized by a solid ball of cells formed by the cleavage of the zygote.
- Assertion: Cells divide without increases in size during the morula stage. This means that as the zygote undergoes cleavage, the individual cells formed do not grow in size. Instead, the zygote divides into smaller cells, resulting in a compact cluster of cells in the morula stage.
- Reason: The zona pellucida is a protective layer surrounding the mammalian oocyte (egg cell). It remains undivided until the cleavage is complete. The zona pellucida provides structural support and protects the developing embryo during early stages of development.
Explanation of the Correct Answer:
- Both the assertion and the reason are true.
- The assertion correctly states that cells divide without an increase in size during the morula stage.
- The reason correctly states that the zona pellucida remains undivided until the cleavage is complete.
- However, the reason does not provide a direct explanation for the assertion. The fact that the zona pellucida remains undivided does not directly explain why cells in the morula stage do not increase in size. Therefore, the reason is not the correct explanation of the assertion.
- Hence, the correct answer is option B: Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
Key Points:
- Morula stage: early stage of embryonic development characterized by a solid ball of cells.
- Cells divide without increasing in size during the morula stage.
- Zona pellucida: protective layer surrounding the mammalian oocyte.
- Zona pellucida remains undivided until cleavage is complete.
- Reason does not provide a direct explanation for the assertion.
Reason: Zona pellucida remains undivided till cleavage is complete.
Explanation:
- The morula stage is an early stage of embryonic development, characterized by a solid ball of cells formed by the cleavage of the zygote.
- Assertion: Cells divide without increases in size during the morula stage. This means that as the zygote undergoes cleavage, the individual cells formed do not grow in size. Instead, the zygote divides into smaller cells, resulting in a compact cluster of cells in the morula stage.
- Reason: The zona pellucida is a protective layer surrounding the mammalian oocyte (egg cell). It remains undivided until the cleavage is complete. The zona pellucida provides structural support and protects the developing embryo during early stages of development.
Explanation of the Correct Answer:
- Both the assertion and the reason are true.
- The assertion correctly states that cells divide without an increase in size during the morula stage.
- The reason correctly states that the zona pellucida remains undivided until the cleavage is complete.
- However, the reason does not provide a direct explanation for the assertion. The fact that the zona pellucida remains undivided does not directly explain why cells in the morula stage do not increase in size. Therefore, the reason is not the correct explanation of the assertion.
- Hence, the correct answer is option B: Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
Key Points:
- Morula stage: early stage of embryonic development characterized by a solid ball of cells.
- Cells divide without increasing in size during the morula stage.
- Zona pellucida: protective layer surrounding the mammalian oocyte.
- Zona pellucida remains undivided until cleavage is complete.
- Reason does not provide a direct explanation for the assertion.
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Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer?.
Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 10.
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Here you can find the meaning of Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : In the morula stage, cells divide without increases in size.Reason : Zona pellucida remain undivided till cleavage is complete.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 10 tests.
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