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Assertion & Reason Test: How do Organisms Reproduce? - 1 - Class 10 MCQ


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10 Questions MCQ Test Online MCQ Tests for Class 10 - Assertion & Reason Test: How do Organisms Reproduce? - 1

Assertion & Reason Test: How do Organisms Reproduce? - 1 for Class 10 2024 is part of Online MCQ Tests for Class 10 preparation. The Assertion & Reason Test: How do Organisms Reproduce? - 1 questions and answers have been prepared according to the Class 10 exam syllabus.The Assertion & Reason Test: How do Organisms Reproduce? - 1 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? - 1 below.
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Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 1

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): Amoeba reproduces by binary fission.

Reason (R): All unicellular organisms reproduce asexually.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 1

Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

Assertion (A) states that Amoeba reproduces by binary fission which is a type of asexual reproduction where the cell divides into two identical daughter cells. This statement is true as Amoeba is a unicellular organism and it reproduces asexually by binary fission.

Reason (R) states that all unicellular organisms reproduce asexually which is also true, many unicellular organisms like Amoeba, bacteria, protozoa, reproduce asexually by various methods such as binary fission, budding, fragmentation, and spores formation.

So, assertion (A) and reason (R) are both true and reason (R) is the correct explanation of assertion (A) as it explains why Amoeba reproduces by binary fission which is an asexual reproduction method.

Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 2

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): Plasmodium reproduces by multiple fission.

Reason (R): Multiple fission is a type of asexual reproduction.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 2
Plasmodium reproduces asexually by multiple fission.
Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 3

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): Plants are vegetatively propagated even though they bear seeds.

Reason (R): Potatoes reproduce through tubers, apples by cutting etc.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 3
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? - 1 - Question 4

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): DNA copying is necessary during reproduction.

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

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 4
DNA copying is necessary during reproduction because it leads to the transmission of characters from parents to offspring and brings about variation.
Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 5

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): Characteristics of parental plants can be preserved through asexual reproduction.

Reason (R): Vegetative reproduction involves only mitosis.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 5
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? - 1 - Question 6

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): Unisexual flowers have separate male and female flowers whereas a typical monocot embryo comprises an embryonal axis with single cotyledon.

Reason (R): Cucumber, pumpkin and water melon are example of unisexual flowers.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 6
Unisexual flowers have separate male and female flowers. The example includes cucumber, pumpkin and watermelon.
Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 7

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): An embryo is formed from a fertilized egg.

Reason (R): A monocot embryo comprises an embryonal axis with two cotyledons.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 7
Zygote, a fertilized egg, gives rise to an embryo, which has the ability to develop into a complete plant. A typical dicot embryo comprises an embryonal axis with two cotyledons.
Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 8

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): Double fertilisation is unique to angiosperms.

Reason (R): Triple fusion occurs in asexual reproduction.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 8
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? - 1 - Question 9

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): Surgical methods are the most effective methods of contraception.

Reason (R): Surgical method blocks gametes transport and hence prevents fertilisation.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 9
Surgical methods like vasectomy in male and tubectomy in females prevent pregnancy. These methods block gamete transport and hence prevent fertilisation. They are very effective but reversibility is very poor.
Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 10

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): In human male, testes are extra abdominal organs which are present inside the scrotum.

Reason (R): Scrotum has a relatively lower temperature needed for the production and storage of sperms.

Detailed Solution for Assertion & Reason Test: How do Organisms Reproduce? - 1 - Question 10
Formation of sperms needs lower temperature than the normal body temperature. Hence, testes lie outside the body cavity in the scrotum.
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