Reproduction in Organisms Test

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Reproduction in Organisms Test - 53

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Weekly Quiz Competition

Question 1
1 / -0

Which one of the following statements is not correct

A
In Potato, Banana, and Ginger, the plantlets arise from intemodes present in the modified stem.

B
Water Hyacinth, growing in standing water, drains oxygen from water that leads to death of fishes

C
Offspring produced by asexual reproduction are called clone

D
Microscopic, motile asexual reproductive structures are called zoospores

Solution

A) In potato, banana, and ginger, the plantlets arise from nodes present in the modified stem. Tubers of potato are the underground modification of stem which stores starch. It has buds on the nodes which helps in the growth of new plant as these buds are meristematic in nature. The buds are also known as eye. Ginger is propagated by the rhizome. It is a underground stem modification. The terminal bud of rhizome may or may not grow into an aerial shoot. The stem is differentiated into nodes and internodes. Adventitious root occurs on the lower side. The plantlets arise from nodes present in the modified stem. Banana is propagated by inflorescence. The female flowers of the inflorescence present on the node of the true stem matures and develop into fruit without fertilization of gametes. So, the statement is false.
B) Water hyacinth is an aquatic weed which is popularly known as the terror of Bengal because it grows very rapidly and eliminates the growth of several species and even eliminates them. Due to its voluminous growth in water bodies, it increases the biological oxygen demand of the water and leads to the death of aquatic life which also cause a major decrease in the biodiversity due to alien species invasion. The statement is true.
C) Asexually developed plants are the clone of their own parents because of the fusion of gametes does not take place in vegetative propagation so there is no chance of recombination and variation. The parent cell divides to form daughter cell by mitosis due to which the offspring are genetically identical to the parent. The statement is true.
D) A zoospore is a motile asexual spore that uses a flagellum for locomotion. The statement is true.
So, the correct answer is option A.
Question 2
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Clones do not appear during.

A
Cuttings

B
Budding

C
Grafting

D
Seed propagation
Question 3
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The type of syngamy in Trichonympha is

A
Hologamy

B
Anisogamy

C
Isogamy

D
Conjugation

Solution

The process of fusion between the haploid male nucleus and egg nucleus is known as amphimixis. It is also known as syngamy. It leads to the formation of a diploid zygote. The form of sexual reproduction in which the gametes are of the same size and structure as the somatic cells. Trichonympha lives in the intestine termite species and helps them to break the cellulose which they take from the wood. They produce similar haploid gametes known as zooflagellates so it is classified as hologamy.
So, the correct answer is option A.
Question 4
1 / -0

Sexual maturity of House Mouse is attained at the age of

A
35 days

B
15 days

C
45 days

D
75 days

Solution

In house mouse, females reach sexual maturity at about six weeks of age and males at about eight weeks, but both can copulate as early as five weeks.
So, the correct option is ‘35days’.
Question 5
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In $$28$$ day human ovarian cycle, ovulation occurs on.

A
Day $$1$$

B
Day $$5$$

C
Day $$14$$

D
Day $$28$$

Solution

Ovulation is the process of the release of an ovum from graffian follicle during menstruation cycle. In a typical 28 human ovarian cycle ovulation occurs on day 14.
So the correct answer is 'Day 14.'
Question 6
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Fertilisation was first discovered by

A
Aristotle

B
Leeuwenhoek

C
Harvey

D
Pander

Solution

Fertilization is the fusion of male and female gametes. In animals, it was first discovered by Aristotle. In plants, it was discovered by Nawaschin.
Question 7
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Which of the following is correct?

A
Menstrual cycle is present in all mammals.

B
Menstrual cycle is present in all primates.

C
Estrus cycle occurs in all mammals.

D
Most mammals are ovoviviparous.

Solution

The gamete formation in females is a cyclic activity that takes about 28/29 days and involves changes in the structure and function of the entire reproductive system. It is called menstrual cycle.
It occurs only in primates( monkeys, apes and human beings). The latter do not show a cyclic change in sex urge and permit copulation at any time in the menstrual cycle. Human female may accept a male at any time, though there is variation in her level of desire.
So, the correct answer is 'Menstrual cycle is present in all primates'
Question 8
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Which of the following is incorrect about fertilization?

A
It restores diploid condition.

B
It activates egg.

C
There is no variation.

D
It determines sex of offspring.

Solution

As the sperm reaches ovum to fertilize it, the ovum gets activated and completes its second meiotic division. After fertilization, a diploid zygote is formed. Fertilization also helps in determining the sex of the offspring. On the one hand, it leads to inherent qualities of a parent and on the other hand, it is the means for variations among the populations.
So, the correct option is 'There is no variation'.
Question 9
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Which of the following pairs is correctly matched?
(i) Fungi Regeneration
(ii) Mosses Fragmentation
(iii) Planaria Budding

A
Only (I)

B
Both (i) & (iii)

C
Only (ii)

D
Only (iii)

Solution

C. Only (ii)
Reason: Fragmentation is a very frequent form of asexual reproduction found in mosses. In this case, a part of the moss can grow to form a new moss. This is used by mosses to help ensure their survival. On the other hand, fungi can reproduce with the help of budding and spores, and Planaria through fragmentation.
So the correct option is C.
Question 10
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The intine of pollen is made up of ___________.

A
Callose

B
Chitin

C
Cellulose

D
Sporopollenin

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(i)	Fungi	Regeneration
(ii)	Mosses	Fragmentation
(iii)	Planaria	Budding

Reproduction in Organisms Test - 53

Result

Reproduction in Organisms Test - 53

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SHARING IS CARING

Question 1

In Potato, Banana, and Ginger, the plantlets arise from intemodes present in the modified stem.

Water Hyacinth, growing in standing water, drains oxygen from water that leads to death of fishes

Offspring produced by asexual reproduction are called clone

Microscopic, motile asexual reproductive structures are called zoospores

Solution

Question 2

Cuttings

Budding

Grafting

Seed propagation

Question 3

Hologamy

Anisogamy

Isogamy

Conjugation

Solution

Question 4

35 days

15 days

45 days

75 days

Solution

Question 5

Day $$1$$

Day $$5$$

Day $$14$$

Day $$28$$

Solution

Question 6

Aristotle

Leeuwenhoek

Harvey

Pander

Solution

Question 7

Menstrual cycle is present in all mammals.

Menstrual cycle is present in all primates.

Estrus cycle occurs in all mammals.

Most mammals are ovoviviparous.

Solution

Question 8

It restores diploid condition.

It activates egg.

There is no variation.

It determines sex of offspring.

Solution

Question 9

Only (I)

Both (i) & (iii)

Only (ii)

Only (iii)

Solution

Question 10

Callose

Chitin

Cellulose

Sporopollenin

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