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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 (A) : Blastocyst undergoes gastrulation to form three germinal layers.
Reason (R) : This involves cell movements (morphogenetic movement) that help to attain new
shape and morphology of embryo.
- 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.
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Directions : In the following questions a statement of assertion (A) ...
During gastrulation, the blastula reorganizes cells migrate to the interior of the
embryo, forming the three germ layers.
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Directions : In the following questions a statement of assertion (A) ...
Assertion (A) is true but reason (R) is false.
Explanation:
Gastrulation is a crucial process in embryonic development where the blastocyst, a hollow ball of cells, undergoes cell movements to form three germinal layers - ectoderm, endoderm, and mesoderm. These germinal layers give rise to various tissues and organs in the developing embryo.
The correct explanation for why blastocyst undergoes gastrulation is not provided by Reason (R). While it is true that gastrulation involves cell movements (morphogenetic movement) that help to attain a new shape and morphology of the embryo, this explanation does not directly correlate with the assertion that blastocyst undergoes gastrulation to form three germinal layers.
The main reason blastocyst undergoes gastrulation is to establish the three germinal layers, which are essential for the subsequent development of specialized tissues and organs. The process of gastrulation involves cell migration, differentiation, and rearrangement, leading to the formation of the ectoderm, endoderm, and mesoderm.
The ectoderm gives rise to the skin, nervous system, and sensory organs. The endoderm forms the lining of the digestive tract, respiratory system, and associated glands. The mesoderm develops into muscles, skeletal system, circulatory system, excretory system, and reproductive system.
Therefore, while the assertion is true, the reason provided is not the correct explanation for the assertion. Hence, option 'C' is the correct answer.
Explanation:
Gastrulation is a crucial process in embryonic development where the blastocyst, a hollow ball of cells, undergoes cell movements to form three germinal layers - ectoderm, endoderm, and mesoderm. These germinal layers give rise to various tissues and organs in the developing embryo.
The correct explanation for why blastocyst undergoes gastrulation is not provided by Reason (R). While it is true that gastrulation involves cell movements (morphogenetic movement) that help to attain a new shape and morphology of the embryo, this explanation does not directly correlate with the assertion that blastocyst undergoes gastrulation to form three germinal layers.
The main reason blastocyst undergoes gastrulation is to establish the three germinal layers, which are essential for the subsequent development of specialized tissues and organs. The process of gastrulation involves cell migration, differentiation, and rearrangement, leading to the formation of the ectoderm, endoderm, and mesoderm.
The ectoderm gives rise to the skin, nervous system, and sensory organs. The endoderm forms the lining of the digestive tract, respiratory system, and associated glands. The mesoderm develops into muscles, skeletal system, circulatory system, excretory system, and reproductive system.
Therefore, while the assertion is true, the reason provided is not the correct explanation for the assertion. Hence, option 'C' is the correct answer.
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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 (A) : Blastocyst undergoes gastrulation to form three germinal layers.Reason (R) : This involves cell movements (morphogenetic movement) that help to attain newshape and morphology of embryo.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.Correct answer is option 'C'. Can you explain this answer?
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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 (A) : Blastocyst undergoes gastrulation to form three germinal layers.Reason (R) : This involves cell movements (morphogenetic movement) that help to attain newshape and morphology of embryo.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.Correct answer is option 'C'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 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 (A) : Blastocyst undergoes gastrulation to form three germinal layers.Reason (R) : This involves cell movements (morphogenetic movement) that help to attain newshape and morphology of embryo.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.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 9 2024 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 (A) : Blastocyst undergoes gastrulation to form three germinal layers.Reason (R) : This involves cell movements (morphogenetic movement) that help to attain newshape and morphology of embryo.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.Correct answer is option 'C'. 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 (A) : Blastocyst undergoes gastrulation to form three germinal layers.Reason (R) : This involves cell movements (morphogenetic movement) that help to attain newshape and morphology of embryo.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.Correct answer is option 'C'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 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 (A) : Blastocyst undergoes gastrulation to form three germinal layers.Reason (R) : This involves cell movements (morphogenetic movement) that help to attain newshape and morphology of embryo.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.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 9 2024 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 (A) : Blastocyst undergoes gastrulation to form three germinal layers.Reason (R) : This involves cell movements (morphogenetic movement) that help to attain newshape and morphology of embryo.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.Correct answer is option 'C'. 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 (A) : Blastocyst undergoes gastrulation to form three germinal layers.Reason (R) : This involves cell movements (morphogenetic movement) that help to attain newshape and morphology of embryo.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.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
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