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CBSE Questions for Class 8 Biology Reproduction In Animals Quiz 1 - MCQExams.com
CBSE
Class 8 Biology
Reproduction In Animals
Quiz 1
Fill in the blank:
When sperms come in contact with an egg, _______________ of the sperms may
fuse with the egg.
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all
0%
two
0%
three
0%
one
Explanation
Millions of sperms are released by a male to fuse with the egg produced by a female, but only one of them finally fuses with the egg to form a zygote.
So, the correct option is D.
What is the function of the jelly on the eggs laid by frogs?
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To hold the eggs together
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To provide protection to the eggs
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Both A and B
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None of the above
Explanation
A layer of jelly holds the eggs together and provides protection to the eggs as the eggs are exposed to water
movement, wind and rainfall.
So, the correct option is C.
The fusion of male and female gametes results in the formation of:
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Zygote
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Embryo
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Sperm
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Egg
Explanation
The fusion of male and female gamete results in the formation of a zygote.
The zygote develops to form an embryo.
The correct answer is option A.
Fill in the blank:
The process of fertilization is the________ of an egg cell from the mother
and a sperm cell from the father.
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mixing
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separation
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fusion
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None of the above
Explanation
The process of fusion of male gamete and female gamete is termed as fertilization.
The correct option is C.
Cloning of Dolly was successfully performed in:
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Scotland
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Austria
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England
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Germany
Explanation
Cloning of Dolly was successfully performed by Ian Wilmut and his colleagues at the Roslin Institute in Edinburgh,
Scotland.
The correct option is A.
How did Dolly, the cloned sheep die?
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Heart disease
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Lung disease
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Mouth infection
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Brain haemorrhage
Explanation
Dolly was a healthy clone, but on 14th February 2003, Dolly died of lung disease.
So, the correct option is B.
Metamorphosis occurs in:
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Rabbit
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Frog
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Man
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Lizard
Explanation
All frogs go through a process called metamorphosis, in which they mature from their larval or tadpole, stage into adult frogs.
Mammals (e.g. rabbit, man) give birth to their young ones and do not perform metamorphosis. Lizard belongs to the class of reptiles and lays eggs.
Thus, the correct answer is option B.
Binary fission is the division of the parent body into how many parts?
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Three
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Four
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Two
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Nine
Birds and snakes are oviparous animals.
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True
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False
Explanation
Oviparous animals are the animals that lay eggs. Snakes and birds lay eggs and hence, they are oviparous animals.
So, the correct answer is option A.
Birds are considered oviparous because _______.
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They are able to fly
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Forelimbs are modified into wings
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They lay eggs
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None of the above
Explanation
Ovipary is the phenomenon in which an adult organism reproduces and lays eggs which later hatch and give rise to young ones.
Since, birds lay eggs they are known as oviparous.
Flight or wing modifications are not related to the process of reproduction.
So the correct answer is 'They lay eggs'.
Reproduction in humans is ____________.
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Asexual
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Sexual
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Vegetative
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Parthenogenetic
Explanation
Reproduction in humans is only sexual. After insemination, there is a fusion of sperm and egg in the oviduct. This process is called fertilization. After fertilization, implantation takes place in the uterus and the development and the growth of the foetus occurs there.
Therefore, the correct answer is option B.
Exclusively sexually reproducing organisms are:
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Monkey
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Hydra
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Cat
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Both A and C
Explanation
Monkey and Cat are mammals. They reproduce sexually. Higher animals do not reproduce asexually. Lower animals like
Hydra
reproduces asexually. Thus, the correct answer is option D.
Internal fertilization occurs in many animals excluding:
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Humans
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Cow
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Frog
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Hen
Explanation
Fertilization which takes place inside the female body is called internal fertilization.
Internal fertilization occurs in many animals including
humans, cows, dogs, and hens, while in the frog, external fertilization takes place.
The correct option is C.
Which of the following patterns of reproduction involves both the parents?
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Sexual reproduction
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Asexual reproduction
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Parthenogenesis
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Vegetative propagation
Explanation
Sexual reproduction is a biological process that creates a new organism by combining the genetic material of two organisms, by the fusion of one gamete from each. Motile male gamete generally fertilizes with non-motile female gamete in this process. (Example: Humans)
Thus, the correct answer is option A.
The technique by which "Dolly" the sheep obtained is termed as:
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Cloning by zygote transfer
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Cloning by nuclear transfer
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Cloning without the help of gametes
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Cloning by tissue culture of somatic cells
Explanation
Dolly is the first sheep that was developed by the technique of cloning. The sheep was developed from the diploid body cell. The somatic cell from the mother sheep was taken and the nucleus was injected into the egg cell (from another sheep) which was cultured and transferred into the surrogate mother. This method is known as nuclear transfer. The sheep Dolly was identical in the characters with the mother who donated the diploid nucleus from the body cell.
Thus, the correct answer is option B.
In markets, eggs of birds are available but never of dogs, because:
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Birds lays eggs but dogs do not.
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Bird's eggs are large but dog's eggs are very small.
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Bird's eggs are covered but dog's eggs are not.
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Bird's eggs are strong but eggs of dogs are not.
Explanation
Birds are oviparous animals which means that they lay eggs. On the other hand, dogs do not lay eggs and are viviparous animals which means that dogs give birth to young ones directly. So, the correct answer is option A.
Select the correct option from the given combinations.
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Asexual reproduction: gametes are produced, Sexual reproduction: gametes are not produced
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Asexual reproduction: gametes are not produced, Sexual reproduction: gametes are produced
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Asexual reproduction: no fertilization and zygote formation, Sexual reproduction: fertilization and zygote formation
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Both B and C
Explanation
In asexual reproduction, a single parent is involved in the production of offspring by fission, budding, or regeneration and no gametes are involved. While in sexual reproduction, gametes are produced by both the parents which fuse to form a zygote.
Thus,
the correct answer is option D.
The diagram given shows a special method of reproduction in an organism. Which of the following organism also reproduces in a similar way?
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Amoeba
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Hydra
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Paramecium
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Euglena
Explanation
The diagram depicts asexual reproduction by budding.
Budding is a mode of asexual reproduction in which a new organism is developed from an outgrowth or bud developed on the parent's body. A mature bud detaches from the parent and grows as a new individual.
Hydra,
yeast
reproduce through budding.
Thus the correct answer is option B.
Exchange of genetic material takes place in ______________.
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Vegetative reproduction
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Asexual reproduction
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Sexual reproduction
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Budding
Explanation
$$\textbf{Correct answer: }$$ Option C
$$\textbf{Explanation for correct answer: }$$
Option C
$$\bullet$$ Sexual reproduction is a method of reproduction which requires the involvement of two parent.
$$\bullet$$ During fertilisation, the fusion of haploid male and haloid female gametes takes place which produces a diploid zygote.
$$\bullet$$ This results in the exchange of genetic material.
$$\textbf{Explanation for incorrect answer: }$$
Option A:
Vegetative is a type of asexual reproduction which uses vegetative parts of the plant as propagules to grow new plants.
Option B:
Asexual reproduction is a method of reproduction which does not involve two parent. The single parent organism divides mitotically to produce daughter organisms that are exact copies of their parent.
Option D:
Budding is a type of asexual reproduction observed in yeasts and $$Hydra$$. The daughter cell buds off from the parent cell.
$$\textbf{Conclusion: }$$ Thus, exchange of genetic material takes place in sexual reproduction.
Viviparity is observed in:
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Frog
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Lizard
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Snake
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Rabbit
Explanation
Viviparity means giving birth to young ones. Viviparous animals produce young ones instead of laying eggs.
The female animal gives birth to the young ones which are just like little adults.
Rabbits give birth to young ones.
Frogs, lizards, and snakes lay eggs which later develop into young ones.
So, the correct answer is option D.
The movement of eggs from the ovaries to the uterus proceed through the ______________.
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Cervix
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Fallopian tube
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Vagina
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Placenta
Explanation
The eggs are produced in the ovaries and are transferred to the uterus through the fallopian tube after fertilization.
The process of fertilization also takes place within the fallopian tube.
Thus, the correct answer is (B) - Fallopian tube.
New individuals formed by asexual method of reproduction have greater similarity among themselves because:
(i) Asexual reproduction involves only one parent.
(ii) Asexual reproduction does not involve gametes.
(iii) Asexual reproduction occurs before sexual reproduction.
(iv) Asexual reproduction occurs after sexual reproduction.
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(i) and (ii)
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(i) and (iii)
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(ii) and (iv)
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(iii) and (iv)
Explanation
In sexual reproduction, fusion of male and female gamete takes place. So, mixing of genetic trait occurs in sexual reproduction. In asexual reproduction, there is no fusion of male and female gamete and offspring develops from single parent because of which new individual is exact copy of parent and inherit same genetic traits. Thus, the correct answer is option A.
The ability of a cell to divide into several cells during reproduction in
Plasmodium
is called __________.
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Budding
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Reduction division
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Binary fission
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Multiple fission
Explanation
During unfavorable conditions, cyst wall is formed around plasmodium. Inside cyst nucleus divides many times to produce many daughter nuclei. During favorable condition, cyst break to release many daughter cell and form new organism
So, the correct answer is '
Multiple fission'
How is reproduction in
Hydra
different from that in
Amoeba
?
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Hydra
reproduces by budding,
Amoeba
reproduces by binary fission.
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Hydra
reproduces by binary fission,
Amoeba
reproduces by budding.
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Hydra
reproduces by sexual reproduction,
Amoeba
reproduces by asexual reproduction.
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Hydra
and
Amoeba
both reproduces by sexual reproduction.
Explanation
Budding is a mode of asexual reproduction in which a new organism is developed from an outgrowth or bud developed on the parent's body.
Hydra
reproduces through budding.
Binary fission is also a mode of asexual reproduction in which the parent cell splits into two daughter cells e.g.,
Amoeba
.
Thus, the correct answer is option A.
The process of series of changes from larva to adult after embryonic development is called:
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Growth
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Ageing
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Regeneration
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Metamorphosis
Explanation
Metamorphosis is a biological process by which animals, including insects, amphibians and few aquatic animals undergo extreme and rapid physical changes someday after birth. The effect of metamorphosis modifies the entire body of an organism.
For example, the Life cycle of a frog: There are three stages where the eggs of a frog develop into a larva (tadpole) and later become an adult frog.
So, the correct option is D.
Binary fission is a type of:
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Sexual reproduction
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Asexual reproduction
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Vegetative reproduction
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All of the above
Explanation
Binary fission is a type of asexual reproduction, in which the parent cell divides into two daughter cells.
Binary fission occurs in amoeba.
Thus, the correct answer is option B.
Which of the following was the first successful animal clone?
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Dolly goat
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Dolly sheep
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Molly goat
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Molly sheep
Explanation
Dolly (5 July 1996 – 14 February 2003) was a female domestic
sheep
and the first animal produced by cloning from an adult somatic cell by using the process of nuclear transfer.
Hence, option B is the correct answer.
Which of the following types of reproduction leads to the variation in the population?
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Sexual reproduction
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Asexual reproduction
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Both of A and B
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Vegetative propagation
Explanation
The process of sexual reproduction involves two parents, each contributing one gamete. The fusion of both the male and female gametes leads to the formation of the zygote, which leads to the formation of the new individual.
Thus, the new individual receives genes from both the parents and has mixed features of both leading to variations.
In asexual reproduction and vegetative propagation, only one parent is involved and the genetic identity is maintained.
So, the correct answer is option A.
Animals who give birth to young ones are:
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Oviparous
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Viviparous
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Ovoviviparous
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All of the above
Explanation
Animals giving birth to young ones are called viviparous animals. The egg of these animals typically contains less yolk insufficient to support the development of the zygote into an embryo. Hence, development proceeds inside the body of the female animal, and the fully developed embryo is delivered.
Oviparous animals lay eggs. Their egg typically has more amount of yolk and can support the development of the zygote into an embryo outside the body of the mother.
Ovoviviparous animals lay eggs and develop the eggs inside the mother's body.
So, the correct answer is option B.
The most fundamental characteristic of living being is ____________.
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Locomotion
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Respiration
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Coordination
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Reproduction
Explanation
Reproduction is the process by which new individual organisms or 'offspring' are produced from their 'parents' and thus, it is a fundamental feature of all known life forms. Each individual organism exists as a result of reproduction.
Therefore, the correct answer is option D.
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