Reproduction in Organisms Test

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Reproduction in Organisms Test - 60

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Question 1
1 / -0

Statement $1$ : Zygote is the vital link between two generations.
Statement $2$ : Zygote is formed due to fusion of two haploid gametes.

A
Both statements $1$ 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 statements $1$ and $2$ are incorrect

Solution

A zygote is a eukaryotic cell formed by a fertilization event between two gametes. The zygote's genome is a combination of the DNA in each gamete and contains all of the genetic information necessary to form a new individual. The zygote is the vital link that ensures continuity of species between organisms of one generation and the next. Every sexually reproducing organism, including human beings, begin life as a single cell - the zygote.
Thus, the correct option is 'Both statements 1 and 2 are correct.'
Question 2
1 / -0

Which of the following statements is not correct regarding oviparous animals?

A
Females lay fertilized/unfertilized eggs at a safe place.

B
Development of zygote takes place outside the female's body.

C
Examples of oviparous animals are all birds, most reptiles and egg-laying mammals.

D
None of these

Solution

Oviparous animals are animals that lay eggs. Fertilization can be external or internal, but the development of the embryo takes place outside the mother's womb. Fish, amphibians, reptiles, birds, and few exceptional mammals (duck-billed platypus), are oviparous. Oviparous animals usually lay their eggs in well-protected nests,
Since all the statements are correct, therefore, the correct option is 'None of these'.
Question 3
1 / -0

Life begin in all sexually reproducing organisms as a

A
Single-celled zygote

B
Double-celled zygote

C
Haploid zygote

D
Haploid gametes

Solution

Zygote is the vital link that ensures continuity of species between organisms of one generation and the next. Every sexually reproducing organism, including human beings begin life as a single cell - the zygote.
Question 4
1 / -0

Given figure of Hydra shows its reproductive structures and manner of fertilisation.
Observe and answer that why is it not showing self fertilisation?

A
Distance between testis and ovary is more

B
Sperms do not swim downwards

C
Ovary matures earlier than testis

D
Testis matures earlier than ovary

Solution

Cross fertilisation occurs in Hydra. The testis matures earlier than ovary. The spermatozoa released from the testis of one Hydra swim in water with their tails and finally come into contact with the ovum of another. Hydra. Ovum lives only for a short time after it is exposed. During this period, fertilisation must take place. Thus, given figure is not showing self-fertilisation but cross-fertilisation.
Question 5
1 / -0

Match the column I with column II.
Column I Column II
(P) External fertilisation (i) Earthworm
(Q) Internal fertilisation (ii) Cockroach
(R) Bisexual (iii) Frogs and Fishes
(S) Unisexual (iv) Birds and mammals

A
$P - (iv), Q - (iii), R - (i), S - (ii)$

B
$P - (iv), Q - (iii), R - (ii), S - (i)$

C
$P - (iii), Q - (iv), R - (ii), S - (i)$

D
$P - (iii), Q - (iv), R - (i), S - (ii)$

Solution

(i). Earthworm belongs to the phylum Annelida. It is hermaphrodite(bisexual). Self-fertilization is excluded by protandry, i.e., maturation of testes earlier than ovaries do.
(ii). Cockroach belongs to the phylum Arthropoda. In this sexes are separate and distinguishable externally( Sexual dimorphism).
(iii). Frog and Fishes: Sexes are separate. Fertilisation is external. Larva occurs in some cases.
(iv). Birds and mammals: There may be sexual dimorphism. Testes are paired. Fertilization is internal.
So, the correct answer is 'P-iii, Q- iv, R- i, S- ii'.
Question 6
1 / -0

Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because

A
Nodes are shorter than internodes

B
Nodes have meristematic cells

C
Nodes are located near the soil

D
Nodes have non-photosynthetic cells

Solution

Vegetative propagation is asexual reproduction from various parts in plants. In plants, such as, sugarcane and ginger, appearance of vegetative propagules from nodes is because of presence of meristematic cells in them. Meristematic cells have the ability to divide to form new cells which can differentiate and given rise to permanent tissues.
So, the correct answer is 'Nodes have meristematic cells'.
Question 7
1 / -0

Choose the correct statement from amongst the following.

A
Dioecious organisms are seen only in animals

B
Dioecious organisms are seen only in plants

C
Dioecious organisms are seen in both plants and animals

D
Dioecious organisms are seen only in vertebrates

Solution

Dioecious organisms are those in which male and female parts are present on different organisms whereas monoecious organisms are those in which male and female parts are present on the same organism. Monoecious organisms are also called as hermaphrodite. Dioecious organisms are seen in both plants and animals. Papaya, date palm and most of the animals are dioecious.
So, the correct answer is 'Dioecious organisms are seen in both plants and animals'.
Question 8
1 / -0

Select the option which shows viviparous animals only.

A
Lizard, Turtle

B
Platypus, Crocodile

C
Cow, Crocodile

D
Whale, Mouse

Solution

In viviparous animals, females give birth to young ones. The development of zygote takes place inside the female's body. Females deliver young ones and the chances of survival of offsprings are more. Mammals (except egg-laying mammals), like whale, shark, mouse, humans are examples of viviparous animals.
So, the correct answer is 'Whale, Mouse'.
Question 9
1 / -0

Ovoviviparity is found in

A
Sharks

B
Lizards

C
Frogs

D
Birds

Solution

In viviparous animals, females give birth to young ones. The development of the zygote takes place inside the female's body. Females deliver young ones and the chances of survival of offspring are more. Mammals (except egg-laying mammals), like whales, sharks, mice, humans are examples of viviparous animals.
So, the correct answer is option A.

Question 10

1 / -0

Which of the following situations correctly describes the similarity between an angiosperm egg and a human egg?
(i) Eggs of both are formed only once in a lifetime.
(ii) Both the angiosperm egg and human egg are stationary.
(iii) Both the angiosperm egg and human egg are motile transported.
(iv) Syngamy in both results in the formation of zygote.

Choose the correct answer from the options given below.

(ii) and (iv)

(iv) only

(iii) and (iv)

(i) and (iv)

Solution

Human egg	Angiospermic egg
Humans are reproductively active throughout their reproductive phase. So, the eggs don't form only once in their lifetime, it produces many times.	Angiosperms are also reproductive throughout their reproductive phase. So, egg produces much time during their reproductive phase.
Human eggs are not stationary. During the process of ovulation, eggs are released from the ovary and transported to the uterus through the fallopian tube.	Angiospermic eggs are stationary. Eggs remain closely packed in the ovary.
Human eggs are not actively motile like human sperm.	Angiospermic eggs are non-motile. That's why for the process of fertilization male gamete enter inside the ovary through the stigma and style.
Syngamy (zygote) formation takes place during the fertilization process.	Syngamy (zygote) formation takes place during the fertilization process.

So, the correct answer is ' Syngamy in both results in the formation of zygote '.

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Column I	Column II
(P) External fertilisation	(i) Earthworm
(Q) Internal fertilisation	(ii) Cockroach
(R) Bisexual	(iii) Frogs and Fishes
(S) Unisexual	(iv) Birds and mammals

Reproduction in Organisms Test - 60

Result

Reproduction in Organisms Test - 60

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Rank

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SHARING IS CARING

Question 1

Both statements 111 and 222 are correct

Statement 111 is correct but statement 222 is incorrect

Statement 111 is incorrect but statement 222 is correct

Both statements 111 and 222 are incorrect

Solution

Question 2

Females lay fertilized/unfertilized eggs at a safe place.

Development of zygote takes place outside the female's body.

Examples of oviparous animals are all birds, most reptiles and egg-laying mammals.

None of these

Solution

Question 3

Single-celled zygote

Double-celled zygote

Haploid zygote

Haploid gametes

Solution

Question 4

Distance between testis and ovary is more

Sperms do not swim downwards

Ovary matures earlier than testis

Testis matures earlier than ovary

Solution

Question 5

P−(iv),Q−(iii),R−(i),S−(ii)P - (iv), Q - (iii), R - (i), S - (ii)P−(iv),Q−(iii),R−(i),S−(ii)

P−(iv),Q−(iii),R−(ii),S−(i)P - (iv), Q - (iii), R - (ii), S - (i)P−(iv),Q−(iii),R−(ii),S−(i)

P−(iii),Q−(iv),R−(ii),S−(i)P - (iii), Q - (iv), R - (ii), S - (i)P−(iii),Q−(iv),R−(ii),S−(i)

P−(iii),Q−(iv),R−(i),S−(ii)P - (iii), Q - (iv), R - (i), S - (ii)P−(iii),Q−(iv),R−(i),S−(ii)

Solution

Question 6

Nodes are shorter than internodes

Nodes have meristematic cells

Nodes are located near the soil

Nodes have non-photosynthetic cells

Solution

Question 7

Dioecious organisms are seen only in animals

Dioecious organisms are seen only in plants

Dioecious organisms are seen in both plants and animals

Dioecious organisms are seen only in vertebrates

Solution

Question 8

Lizard, Turtle

Platypus, Crocodile

Cow, Crocodile

Whale, Mouse

Solution

Question 9

Sharks

Lizards

Frogs

Birds

Solution

Question 10

(ii) and (iv)

(iv) only

(iii) and (iv)

(i) and (iv)

Solution

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Both statements $1$ and $2$ are correct

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

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

Both statements $1$ and $2$ are incorrect

$P - (iv), Q - (iii), R - (i), S - (ii)$

$P - (iv), Q - (iii), R - (ii), S - (i)$

$P - (iii), Q - (iv), R - (ii), S - (i)$

$P - (iii), Q - (iv), R - (i), S - (ii)$