How do Organisms Reproduce Test

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How do Organisms Reproduce Test - 32

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Question 1
1 / -0

Fill in the blank:
The generation of variation is a fairly ________ process.

A
slow

B
fast

C
steady

D
None of the above

Solution

While DNA-copying mechanisms are not absolutely accurate, they are precise enough to make the generation of variation a fairly slow process.
The correct option is A.
Question 2
1 / -0

What is the purpose of combining variations from two or more individuals by sexual reproduction?

A
To create new combinations of variants.

B
To make DNA copying mechanism accurate.

C
To decrease the chances of survival.

D
To ensure no variants are created.

Solution

Combining variations from two or more individuals would create new combinations of variants. Each combination would be novel since it would involve two different individuals.
The correct option is A.
Question 3
1 / -0

In which process is the number of chromosomes is reduced to half?

A
Mitosis

B
Meiosis

C
Budding

D
Fragmentation

Solution

Meiosis is the process in which a cell divides in a reduced manner so that only half of the genetic material is left in each new cell.
The correct option is B.
Question 4
1 / -0

Fill in the blank:
_____________ is stored in the female gamete and is used by the developing zygote.

A
Food

B
Water

C
Both A and B

D
None of the above

Solution

The female gamete is large and stores food for the developing zygote after fertilization.
The correct option is A.
Question 5
1 / -0

Which of the given organisms reproduce sexually?

A
Amoeba

B
Paramecium

C
Anura

D
Hydra
Solution
- Frog (Anura) reproduces sexually by the process of external fertilization, where male and female gametes fuse outside the body of the female. Here, both the gametes are released into water bodies like ponds, where they fertilize.
- In Amoeba, Paramoeium, and Hydra undergo asexual reproduction.
Thus the correct answer is option C.
Question 6
1 / -0

All organisms multiply or reproduce their ________.

A
Own kind

B
Different kind

C
Both A and B

D
None of the above

Solution

All organisms multiply or reproduce their own kind.
Option A is correct.
Question 7
1 / -0

Contraceptive oral pills help in birth control process by

A
Preventing ovulation

B
Killing the ova

C
Killing the sperms

D
Forming barriers between sperms and ova
Solution
- Fertilization of the ovum and its subsequent implantation is referred to as conception or pregnancy. Prevention of conception is called contraception.
- Oral contraceptives (birth control pills) can be taken to change the hormonal balance of the body so that the ovum is not released from the ovary.
- The pills may contain combinations of the hormones estrogen and progestins or progestins alone.
- Combinations of estrogen and progestins prevent pregnancy by inhibiting the release of the hormones luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the pituitary gland, which further prevents ovulation.
Thus, the correct answer is option A.
Question 8
1 / -0

Directions For Questions

The diagram shows a male reproductive system.

...view full instructions

Male gametes and sex hormones are produced in structure ______.

A
L

B
X

C
P

D
Z

Solution

Male gametes and sex hormones are produced in the testis.
Structure Z depicts the testis in the diagram.
Thus, Option "D" is correct.
Question 9
1 / -0

During adolescence, the body of boys and girls undergoes certain changes. Given below are a few of those changes. Find which changes occur in boys:
(a) Broad shoulders
(b) Wider chests
(c) Broadening of the hip region
(d) Development of muscles
(e) Development of mammary glands
(f) Growth of facial hair
(g) Acne and pimples on the face
(h) Development of sex organs
(i) High-pitched voice
(j) Growth of pubic hair

A
Broad shoulders, wider chests, development of muscles, growth of facial hair, acne and pimples on face, development of sex organs, growth of pubic hair.

B
Broadening of the hip region, broad shoulders, wider chests, development of muscles, growth of facial hair, acne and pimples on the face, development of sex organs, growth of pubic hair.

C
Development of mammary glands, acne and pimples on face, development of sex organs, growth of pubic hair.

D
Broadening of the hip region, broad shoulders, wider chests, development of muscles, growth of facial hair.

Solution

Puberty is the process that involves physical changes through which a child's body, matures into an adult body. The changes involved in boys include broader shoulders and chest. By the end of puberty, men have heavier bones and nearly twice as much skeletal muscle. The skin starts responding to the male hormones and develops facial hairs and also pubic hairs. These hormones also increase the secretion of oil or sebum from the skin resulting in acne. Broadening of the hip region and development of the mammary gland exclusively occur in females, during puberty.
Therefore, the correct answer is option A.
Question 10
1 / -0

What could be the reasons for adopting contraceptive methods?

A
To maintain the population size by preventing unwanted pregnancies.

B
To maintain the distance between two children and to plan the family size.

C
To prevent sexually transmitted diseases.

D
All of the above

Solution

Contraceptive methods are temporary, long-term or permanent methods used to prevent pregnancy. There are many advantages of using contraceptives.
a. People use contraceptives for birth control, to stop having unwanted children.
b. Also, the use of contraceptives helps space the timing of the births of the children.
c. Most importantly, it reduces the risk of contracting a sexually transmitted disease.
So, the correct answer is option D.

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How do Organisms Reproduce Test - 32

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How do Organisms Reproduce Test - 32

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SHARING IS CARING

Question 1

slow

fast

steady

None of the above

Solution

Question 2

To create new combinations of variants.

To make DNA copying mechanism accurate.

To decrease the chances of survival.

To ensure no variants are created.

Solution

Question 3

Mitosis

Meiosis

Budding

Fragmentation

Solution

Question 4

Food

Water

Both A and B

None of the above

Solution

Question 5

Amoeba

Paramecium

Anura

Hydra

Solution

Question 6

Own kind

Different kind

Both A and B

None of the above

Solution

Question 7

Preventing ovulation

Killing the ova

Killing the sperms

Forming barriers between sperms and ova

Solution

Question 8

L

X

P

Z

Solution

Question 9

Broad shoulders, wider chests, development of muscles, growth of facial hair, acne and pimples on face, development of sex organs, growth of pubic hair.

Broadening of the hip region, broad shoulders, wider chests, development of muscles, growth of facial hair, acne and pimples on the face, development of sex organs, growth of pubic hair.

Development of mammary glands, acne and pimples on face, development of sex organs, growth of pubic hair.

Broadening of the hip region, broad shoulders, wider chests, development of muscles, growth of facial hair.

Solution

Question 10

To maintain the population size by preventing unwanted pregnancies.

To maintain the distance between two children and to plan the family size.

To prevent sexually transmitted diseases.

All of the above

Solution

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