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Class 10 Exam  >  Class 10 Tests  >  Assertion & Reason Test: How do Organisms Reproduce? - 2 - Class 10 MCQ

Assertion & Reason Test: How do Organisms Reproduce? - 2 - Class 10 MCQ


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15 Questions MCQ Test - Assertion & Reason Test: How do Organisms Reproduce? - 2

Assertion & Reason Test: How do Organisms Reproduce? - 2 for Class 10 2024 is part of Class 10 preparation. The Assertion & Reason Test: How do Organisms Reproduce? - 2 questions and answers have been prepared according to the Class 10 exam syllabus.The Assertion & Reason Test: How do Organisms Reproduce? - 2 MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion & Reason Test: How do Organisms Reproduce? - 2 below.
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Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 1
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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): Sexual reproduction increases genetic diversities and plays a role in origin of new species.

Reason (R): Sexual reproduction involves formation of gametes and fusion of gametes.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 1
Sexual reproduction involves two parents that results in the offsprings that are not identical to the parents. It causes variations; which are essential for evolution as well as survival of species under unfavourable conditions.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 2
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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): At puberty, in boys, the voice begins to crack and thick hair grows on the face.

Reason (R): At puberty, there is decreased secretion of testosterone in boys.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 2
Puberty in boys is regulated by male sex hormone called testosterone, which are secreted by testes. In puberty, secondary sexual characteristics like growth of hair on face, chest, broadening of shoulders and deepening of voice occurs.
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Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 3
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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 : DNA copying is necessary during reproduction.

Reason : DNA copying leads to the transmission of characters from parents to offspring.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 3
DNA copying is necessary during reproduction because it leads to the transmission of characters from parents to offsprings and brings about variation.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 4
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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 : Sexual reproduction increases genetic diversities and plays a role in the origin of new species.

Reason : Sexual reproduction involves formation of gametes and fusion of gametes.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 4
Sexual reproduction involves two parents that results in the offsprings that are not identical to the parents. It causes variations; which are essential for evolution as well as survival of species under unfavourable conditions.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 5
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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 : Scrotum is present outside the abdominal cavity.

Reason : It stores sperms which require a lower temperature than the normal body temperature.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 5
Scrotum, a pouch containing testis is present outside the abdominal cavity because sperms require a lower temperature than the normal body temperature.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 6
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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 : Individuals produced by asexual reproduction are known as clones.

Reason : They are known as clones because they are genetically identical.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 6
The new individuals produced after cell divisions in asexual reproduction are always genetically identical or clone to each other and their parents.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 7
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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 : HIV-AIDS is a bacterial disease.

Reason : It spreads through sharing of food and water.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 7
HIV-AIDS is a viral disease that is transmitted sexually.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 8
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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 : Amobea reproduces by Binary fission.

Reason : All unicellular organisms reproduce asexually
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 8
Amoeba is a unicellular organism. It reproduces asexually through binary fission. It is the division of one cell into two similar or identical cells.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 9
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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 : Double fertilisation is unique to angiosperms.

Reason : Triple fusion occurs in both fertilizations.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 9
Double fertilization is a characteristic feature of flowering plants. In this process, out of the two sperm nuclei, one sperm nucleus fuses with the egg nucleus to form an embryo (process is called syngamy) and another fuses with the secondary nucleus to form an endosperm (process is called triple fusion). Because two kinds of fusion-syngamy and triple fusion-take place, the process is known as double fertilisation.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 10
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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 : Plants are vegetatively propagated even though they bear seeds.

Reason : Potatoes reproduce through tubers, apples by cutting etc.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 10
Vegetative reproduction happens through the use of vegetative parts of the plants, such as leaves, stems, and roots to produce new plants or through growth from specialized vegetative plant parts.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 11
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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 : Characteristics of parental plants can be preserved through asexual reproduction.

Reason : Vegetative reproduction involves only mitosis.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 11
Asexual reproduction involves a single individual, which give rise to new individual that are genetically identical to parents. It is because, when organisms reproduce asexually, only mitotic divisions are involved and the chromosome number remains the same.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 12
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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 : During fertilization only the head of spermatozoa enters the egg.

Reason : If several spermatozoa hit the egg at same time, all can enter the egg.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 12
During fertilization, only one sperm head enters into ovum and remaining parts of body degenerates. If several spermatozoa hit the egg at same time, even then only one cal get entry into egg because after entry of one sperm, the egg becomes impervious to other sperms.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 13
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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 : amoeba shows multiple fission during unfavorable conditions.

Reason : Chances of survival are less during unfavourable conditions.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 13
Multiple fission is that type of asexual reproduction in which the parental body divides into many daughter cells simultaneously during the unfavorable conditions to increase the chances of survival of daughter cells. In this, the reproductive unit is the whole parental body. However, the chances of survival are quite less.

Thus, the correct answer is option (A).

Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 14
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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 human male, testes are extra-abdominal which are present inside the scrotum.

Reason : Scrotum has a relatively lower temperature needed for the production and storage of sperms.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 14
Formation of sperms needs lower temperature than the normal body temperature. Hence, testes lie outside the body cavity in the scrotum.
Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 15
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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 : Spores are unicellular bodies.

Reason : The parent body simply breaks up into smaller pieces on maturation.
Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 2 - Question 15
Explanation:
To determine the correct choice, let's analyze the given assertion and reason:
Assertion: Spores are unicellular bodies.
Reason: The parent body simply breaks up into smaller pieces on maturation.
Now, let's evaluate the options:
A: Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- This option implies that both the assertion and the reason are true and that the reason provides a correct explanation for the assertion.
B: Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- This option states that both the assertion and the reason are true, but the reason does not provide the correct explanation for the assertion.
C: Assertion (A) is true but reason (R) is false.
- This option suggests that the assertion is true, but the reason is false.
D: Assertion (A) is false but reason (R) is true.
- This option implies that the assertion is false, but the reason is true.
E: Both Assertion and Reason are false.
- This option states that both the assertion and the reason are false.
Based on the given information, we can conclude that:
- Spores are indeed unicellular bodies, which means that the assertion is true.
- However, the reason provided is incorrect. Spores are not formed by the parent body breaking up into smaller pieces on maturation. Instead, spores are reproductive structures that are released from the parent organism.
Therefore, the correct choice is C: Assertion (A) is true but reason (R) is false.
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