How do Organisms Reproduce Test

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How do Organisms Reproduce Test - 29

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Question 1
1 / -0

Which of the following is a post fertilization event in flowering plants?

A
Transfer of pollen grains

B
Embryo development

C
Formation of flower

D
Formation of pollen grains

Solution

Events in sexual reproduction after the fertilization are called post-fertilization events. After fertilization, a diploid zygote is formed in all sexually reproducing organisms. The process of development of an embryo from the zygote is called embryogenesis.
So, the correct answer is 'Embryo development.
Question 2
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During binary fission in Amoeba which of the following organelles is duplicated?

A
Plasma membrane

B
Nucleus

C
Contractile vacuole

D
All of the above
Solution
- In the process of binary fission one parent cell divides to produce two equal cells that give rise to two new individuals, e.g., bacteria and Amoeba.
- Hence in Amoeba nucleus in the parent cell is duplicated before it divides and forms 2 separate individuals so that both can get complete genetic material.
So, the correct answer is option is B.
Question 3
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Statement $$1$$ : Unisexual flowers are either staminate flowers or pistillate flowers.
Statement $$2$$ : Both monoecious and dioecious plants have unisexual flowers.

A
Both statement $$1$$ and $$2$$ are correct

B
Statement $$1$$ is correct but statement $$2$$ is incorrect

C
Statement $$1$$ is incorrect but statement $$2$$ is correct

D
Both statement $$1$$ and $$2$$ are incorrect
Solution
- In flowering plants, the unisexual male flower is staminate, i.e., bearing stamens, while the female flower is pistillate i.e., bearing pistils.
- Species with both male flowers and female flowers on the same plant are monoecious, while species in which the male flowers are on one plant and the female flowers are on another are dioecious.”
So, the correct option is A.
Question 4
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__________ are the ways of family planning.

A
Taking contraceptive pills

B
Using condoms

C
Inserting copper-T

D
All of the above
Solution
- Family planning allows prevention of unwanted pregnancies and thus, control population.
- There are temporary and permanent methods of preventing unwanted pregnancy.
- Temporary birth control includes the use of condoms, diaphragms, insertion of an intrauterine device (IUD) like a copper-T, taking contraception pills (hormonal contraception).
- Permanent methods involve vasectomy or tubectomy.
Hence, the correct answer is option D.
Question 5
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The period during adolescence when body begins attaining sexual maturation is ______.

A
Menstruation

B
Puberty

C
Menopause

D
Adulthood

Solution

The process by which an individual becomes sexually mature and capable of reproduction is called Puberty. The process of sexual maturation begins during adolescence and certain changes start appearing in the body.
So, the correct answer is option B.
Question 6
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Choose the correct statements about reproduction.
a) Reproduction produces progeny with more or less similar features to the parents.
b) Reproduction occurs by involving one parent (asexual) or two parents (sexual).
c) Budding and fragmentation are the types of asexual reproduction.
d) Reproduction is not observed in non-living organisms.

A
All of the above

B
All except I

C
All except IV

D
All except III
Solution
Reproduction is the biological process through which a new individual, i.e. offspring is produced by their parents.
It is of two types - sexual reproduction and asexual reproduction.
Asexual reproduction occurs through the involvement of the single parent.
It occurs by many methods, e.g. Binary fission, budding, fragmentation, etc.
Asexually reproduced offspring is an identical copy of its parents.
Sexual reproduction occurs through the involvement of two parents and, therefore, sexually reproduced offspring are less similar to their parents.
Reproduction is the characteristic feature of living beings.
So, the correct answer is option A.
Question 7
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While observing a permanent slide of amoeba, Ramesh saw an oval-shaped nucleus. This nucleus indicates ________.

A
Binary fission

B
Budding

C
Multiple division

D
None of the above

Solution

The oval-shaped nucleus indicates binary fission. Binary fission is a type of asexual reproduction seen in bacteria and amoeba. In this method, the content of the cell divides into 2 equal halves forming 2 daughter cells. Before constriction from the center of the cell, the nucleus becomes oval-shaped. The oval-shaped nucleus indicates a dividing nucleus.
Thus, the correct answer is 'Binary fission.'
Question 8
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The two common changes that appear specifically in human males during adolescence are:

A
Deepening of voice and appearance of facial hair

B
Increase in breast size and formation of pimples

C
Shallow voice and development of reproductive organs

D
Darkening of skin and hips become wider

Solution

The common changes that appear in human males during the adolescent period are the deepening of the voice and the appearance of facial hair on the body.
An increase in breast size and hips becoming wider are the changes observed in females.
While the formation of pimples and the development of reproductive organs are common changes in both males and females.

Option "A" is correct.
Question 9
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$$32$$ celled stage of human embryo is?

A
Smaller than fertilized egg

B
Same size of fertilized egg

C
Two times the size of fertilized egg

D
Four times the size of fertilized egg
Question 10
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After fertilization ______ develops into seed and ovary into fruit.

A
Ovule

B
ovary

C
embryo sac

D
egg cell

Solution

After fertilization, each ovule develops into a seed. Each seed contains a tiny, undeveloped plant called the embryo.
The ovary surrounding the ovules develops into a fruit that contains one or more seeds.
So, the correct answer is option 'A'.

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Re-Attempt Weekly Quiz Competition

How do Organisms Reproduce Test - 29

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How do Organisms Reproduce Test - 29

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SHARING IS CARING

Question 1

Transfer of pollen grains

Embryo development

Formation of flower

Formation of pollen grains

Solution

Question 2

Plasma membrane

Nucleus

Contractile vacuole

All of the above

Solution

Question 3

Both statement $$1$$ and $$2$$ are correct

Statement $$1$$ is correct but statement $$2$$ is incorrect

Statement $$1$$ is incorrect but statement $$2$$ is correct

Both statement $$1$$ and $$2$$ are incorrect

Solution

Question 4

Taking contraceptive pills

Using condoms

Inserting copper-T

All of the above

Solution

Question 5

Menstruation

Puberty

Menopause

Adulthood

Solution

Question 6

All of the above

All except I

All except IV

All except III

Solution

Question 7

Binary fission

Budding

Multiple division

None of the above

Solution

Question 8

Deepening of voice and appearance of facial hair

Increase in breast size and formation of pimples

Shallow voice and development of reproductive organs

Darkening of skin and hips become wider

Solution

Question 9

Smaller than fertilized egg

Same size of fertilized egg

Two times the size of fertilized egg

Four times the size of fertilized egg

Question 10

Ovule

ovary

embryo sac

egg cell

Solution

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