How do Organisms Reproduce Test

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How do Organisms Reproduce Test - 16

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Question 1
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Modes of sexual reproduction allow for________to be generated.

A
Greater variation

B
Marginal variation

C
Secondary variation

D
Slighter variation

Solution

The modes of sexual reproduction results in greater variation which can be lead to evolution of species. Option A is correct.
Question 2
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Which of the following is the part through vegetative propagation occur in a jasmine plant?

A
Stem

B
Root

C
Flower

D
Leaf

Solution

The part through which vegetative propagation in the jasmine plant is the stem. When the branches are cut and planted in the soil, they will start developing roots and grow into a separate plant independent of the mother plant.
So the correct option is A.
Question 3
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Which of the following fruits are fleshy and juicy?

A
Apple

B
Orange

C
Mango

D
All of the above

Solution

The fruit is the ripened ovary. The seeds develop from the ovules. The seed contains an embryo enclosed in a protective seed coat. Some fruits are fleshy and juicy such as mango, apple and orange. Option D is correct.
Question 4
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Factors responsible for the rapid spread of bread mould on slices of bread are:
(i) Large number of spores
(ii) Availability of moisture and nutrients in bread
(iii) Presence of tubular branched hyphae
(iv) Formation of round-shaped sporangia

A
(i) and (iii)

B
(ii) and iv)

C
(i) and (ii)

D
(iii) and (iv)

Solution

In the presence of moisture and nutrients, bread mould (a kind of fungus) shows enormous growth and produces a large number of spores. The spores germinate when conditions are ambient and produce new hyphae. Rhizopus stolonifer is the common bread mould.
Question 5
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Among the following, which one is not a method of vegetative propagation?

A
Budding

B
Layering

C
Sowing

D
Tissue culture

Solution

Sowing is related to a method of agricultural practices. Sowing is the method of planting seeds which are produced as a result of sexual reproduction. These seeds then develop into the plant in favorable conditions. Whereas, budding, layering and tissue culture is the method of vegetative propagation. Thus, the correct answer is option C.
Question 6
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Binary fission is found in

A
Amoeba

B
Paramecium

C
Planaria

D
All of the above

Solution

Binary fission is the method of asexual reproduction in unicellular organisms. 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.
Types of binary fission seen in the organisms are as follows: Simple binary fission, Transverse binary fission, and Longitudinal binary fission.
1. Simple binary fission: This type of binary fission occurs in irregular-shaped organisms such as Amoeba, in which the plane of division is difficult to ascertain.
2. Transverse binary fission: it is the method of the division at a right angle to the long axis of the animal e.g., Paramecium and Planaria.
3. Longitudinal binary fission: In this method division is parallel to the long axis, as in Euglena, Vorticella and in some corals.
Thus, the correct answer is option D.
Question 7
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Which of the following birth control measure can be considered as the safest?

A
The rhythm method

B
The use of physical barriers

C
Termination of unwanted pregnancy

D
Sterilization techniques
Solution
Rhythm method: The biggest drawback is that it is not as effective in preventing pregnancy as other methods of birth control.
Failure rates for barrier contraception are much higher than those of long acting reversible contraception.
Termination of unwanted pregnancy after specific time is quiet risky for mother.
Sterilization method: It is a very effective and permanent method of contraception. Sterilization techniques can be considered as the safest among the options as the side-effects are less among others in the long run of time.
Thus, the correct answer is Option 'D'.
Question 8
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In Spirogyra, asexual reproduction takes place by:

A
Breaking up of fragments into smaller bits.

B
Division of a cell into two cells.

C
Division of a cell into many cells.

D
Formation of young cells from older cells.

Solution

Spirogyra reproduces asexually by fragmentation and sexually by conjugation. In the fragmentation method, Spirogyra breaks into two or more segments and each segment forms a new organism.
Question 9
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Offspring formed as a result of sexual reproduction exhibits more variations because

A
Sexual reproduction is a lengthy process.

B
Genetic material comes from two parents of the same species.

C
Genetic material comes from two parents of different species.

D
Genetic material comes from many parents.

Solution

Sexual reproduction is the process in which two individuals of same species participate, contributing two different gametes, one male gamete and another female gamete. Due to the fusion of gametes, mixing of genetic material takes place and a diploid cell with the new combinations is formed. Thus, the correct answer is option B.
Question 10
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Characters that are transmitted from parents to offspring during reproduction show:

A
Only similarities with the parents.

B
Only variations with the parents.

C
Both similarities and variations with the parents.

D
Neither similarities nor variations.
Solution
The characters that are transmitted from parents to offspring during reproduction show similarities with the parents because the offspring inherit them from their parents.
But, copying of DNA is a biochemical process, which is not absolutely reliable.
Therefore, it is only to be expected that the process of copying the DNA will have some variations each time.
As a result, the DNA copies generated will be similar, but may not be identical to the original DNA from parents.
So, the correct option is C.

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Re-Attempt Weekly Quiz Competition

How do Organisms Reproduce Test - 16

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How do Organisms Reproduce Test - 16

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SHARING IS CARING

Question 1

Greater variation

Marginal variation

Secondary variation

Slighter variation

Solution

Question 2

Stem

Root

Flower

Leaf

Solution

Question 3

Apple

Orange

Mango

All of the above

Solution

Question 4

(i) and (iii)

(ii) and iv)

(i) and (ii)

(iii) and (iv)

Solution

Question 5

Budding

Layering

Sowing

Tissue culture

Solution

Question 6

Amoeba

Paramecium

Planaria

All of the above

Solution

Question 7

The rhythm method

The use of physical barriers

Termination of unwanted pregnancy

Sterilization techniques

Solution

Question 8

Breaking up of fragments into smaller bits.

Division of a cell into two cells.

Division of a cell into many cells.

Formation of young cells from older cells.

Solution

Question 9

Sexual reproduction is a lengthy process.

Genetic material comes from two parents of the same species.

Genetic material comes from two parents of different species.

Genetic material comes from many parents.

Solution

Question 10

Only similarities with the parents.

Only variations with the parents.

Both similarities and variations with the parents.

Neither similarities nor variations.

Solution

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