How do Organisms Reproduce Test

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How do Organisms Reproduce Test - 19

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Question 1
1 / -0

Which of the following organisms reproduce by the fragmentation method?

A
Rhizopus and Penicillium

B
Hydra and Amoeba

C
Paramecium and Plasmodium

D
Spirogyra

Solution

Spirogyra is a genus of green algae. It reproduces by fragmentation. The body of Spirogyra on maturing simply splits into smaller pieces or fragments due to water current; these pieces or fragments then grow into new individuals.
Thus, the correct answer is option D.
Question 2
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Identify the process in the figure.

A
Budding

B
Binary fission

C
Regeneration

D
Spore formation

Solution

Binary fission is a type of asexual reproduction. It is the process in which the parent divides into two daughter cells that are genetically and morphologically similar. During this process, the nucleus divides into two, followed by the division of the cytoplasm. Binary fission takes place in bacteria, amoeba, etc.
Therefore, the correct answer is option B.
Question 3
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Which of the following are the characteristics of vegetative reproduction?

X - Involves two individuals.

Y - Daughter cells are genetically identical to the parent.

Z - The cell divisions are only mitotic.

A
X and Y only

B
X and Z only

C
Y and Z only

D
X, Y and Z
Solution
Vegetative reproduction is a type of reproduction in which a single parent is involved. In this, there is no formation or fusion of gametes.
In the cloning method of vegetative reproduction, the offspring produced are genetically identical to the parent cell. They are exact copies of the parent and thus are called clones.
In vegetative reproduction, cells only divide by mitosis, not meiosis (occurs during gamete formation in sexual reproduction).
Thus the correct answer is option C.
Question 4
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Binary fission is observed in which of the following figures?

A
A

B
B

C
C

D
D

Solution

Amoeba is a unicellular organism that reproduces through binary fission. After replicating its genetic material through mitotic division, the cell divides into two equal-sized daughter cells. In this method, two similar individuals are produced from a single-parent cell.
Thus, the correct answer is option C.
Question 5
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The event that first occurs during binary fission of amoeba is:

A
Division of cytoplasm

B
Formation of two daughter cells

C
Division of nucleus

D
None of the above

Solution

In binary fission of amoeba, the nucleus divides first, followed by the division of the cytoplasm to form two new daughter cells.
Hence, the correct option is C.
Question 6
1 / -0

Which of the following parts of the flower develops to become a fruit?

A
Stigma

B
Style

C
Ovary

D
Ovule

Solution

A fertilized flower gives rise to fruit. The ovule is changed into a seed and the ovary forms a fruit. The petals, sepals, stamens, style and stigma fall off.
Thus the correct answer is option C.
Question 7
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What is the basic difference between binary fission and budding?

A
In budding, the parent's identity is lost, while in binary fission, it is maintained.

B
In binary fission, the parent's identity is lost, while it is maintained in budding.

C
There is a fusion of daughter cells in binary fission while in budding, genetically non-identical daughter cells are produced.

D
In binary fission, two dissimilar individuals (daughter cells) are formed while in budding, daughter and parent cells are similar.
Solution
- Binary fission and budding both are the modes of asexual reproduction. But in binary fission, the parent cell splits into two daughter cells and loses its identity.
- Whereas in budding, the parent cell first produces an outgrowth or bud which gets detached after maturity and survives as an individual. The parent identity is thus retained.
- In binary fission, the cytoplasm divides evenly whereas in budding cytoplasm divides unevenly.
  Hence, the correct answer is B.
Question 8
1 / -0

To prepare a temporary slide of yeast culture, yeast granules are added in:
(a) distilled water
(b) 10% sugar solution
(c) 90% sugar solution
(d) dilute hydrochloric acid

A
a

B
b

C
c

D
d

Solution

For yeast culture, yeast granules are added to around 10% sugar solution. Sugar provides energy to yeasts so that these can carry out various life processes.
Hence, the correct answer is option B.
Question 9
1 / -0

In binary fission:

A
The parent organism divides into two daughter cells and each one of them grows into an adult

B
The parent organism divides into many daughter cells and each one of them grows into an adult.

C
Both (a) and (b)

D
None of the above
Solution
Correct option: A
Explanation:
In binary fission, an organism divides into two and later they develop into adults.
Whereas in multiple fission, the parent cell divides into many daughter cells and the latter grow into adults.
carries out binary fission.Amoeba

Hence, in binary fission "The parent organism divides into two daughter cells and each one of them grows into an adult".
Question 10
1 / -0

Which of these break up into smaller pieces upon maturation?

A
Rhodella

B
Spirogyra

C
Caulerpa

D
All of the above
Solution
- Spirogyra is a genus of filamentous green algae which reproduce by fragmentation. The body of Spirogyra on maturing simply breaks up into smaller pieces or fragments. These pieces or fragments then grow into new individuals.
- Rhodella is reproduced through binary fission.
- Caulerpa is reproduced through zoospores, and also vegetative and sexual reproduction is present.
Thus, the correct answer is option (B), 'Spirogyra'.

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How do Organisms Reproduce Test - 19

Result

How do Organisms Reproduce Test - 19

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SHARING IS CARING

Question 1

Rhizopus and Penicillium

Hydra and Amoeba

Paramecium and Plasmodium

Spirogyra

Solution

Question 2

Budding

Binary fission

Regeneration

Spore formation

Solution

Question 3

X and Y only

X and Z only

Y and Z only

X, Y and Z

Solution

Question 4

A

B

C

D

Solution

Question 5

Division of cytoplasm

Formation of two daughter cells

Division of nucleus

None of the above

Solution

Question 6

Stigma

Style

Ovary

Ovule

Solution

Question 7

In budding, the parent's identity is lost, while in binary fission, it is maintained.

In binary fission, the parent's identity is lost, while it is maintained in budding.

There is a fusion of daughter cells in binary fission while in budding, genetically non-identical daughter cells are produced.

In binary fission, two dissimilar individuals (daughter cells) are formed while in budding, daughter and parent cells are similar.

Solution

Question 8

a

b

c

d

Solution

Question 9

The parent organism divides into two daughter cells and each one of them grows into an adult

The parent organism divides into many daughter cells and each one of them grows into an adult.

Both (a) and (b)

None of the above

Solution

Question 10

Rhodella

Spirogyra

Caulerpa

All of the above

Solution

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