12th Grade > Biology
REPRODUCTION IN ORGANISMS MCQs
Total Questions : 69
| Page 2 of 7 pages
Answer: Option A. -> Zygote
:
A
All sexually reproducing organisms develops from single cell called zygote. Zygote is formed by fusion of male and female gamete. Traits from male and female parent are present in the zygote.
:
A
All sexually reproducing organisms develops from single cell called zygote. Zygote is formed by fusion of male and female gamete. Traits from male and female parent are present in the zygote.
Answer: Option C. -> Viviparous
:
C
Animals reproduce sexually either by producing fertilized egg or by giving birth young ones directly. The viviparous (young one producing) is more evolved method of sexual reproduction.
:
C
Animals reproduce sexually either by producing fertilized egg or by giving birth young ones directly. The viviparous (young one producing) is more evolved method of sexual reproduction.
Answer: Option A. -> Cladophora
:
A
In some algae the two gametes are so similar in appearance that it is not possible to categorise them into male and female gametes.They are called isogametes eg:-Cladophora.The other organisms mentioned here, that is frog, marchantia and humans produce heterogametes.
:
A
In some algae the two gametes are so similar in appearance that it is not possible to categorise them into male and female gametes.They are called isogametes eg:-Cladophora.The other organisms mentioned here, that is frog, marchantia and humans produce heterogametes.
Answer: Option C. -> Statement A is correct and B is wrong
:
C
In viviparousanimals the embryo is implanted in the female body and it derives nourishment from the parent. These animals provide maximum care for the embryo, nourishing it until it grows into a fully formed fetus and givingbirth toyoung ones. For e.g. mammals. Embryonic care and protection is greatest in these animals, giving their offspring the highest chanceof survival.
Oviparous organisms like reptiles and birdslay fertilised eggs, here even though fertilisation is internal, embryogenesis is external. The eggs laid by these animals are protected by a hard calcareous shell and are laid in a safe place in the environment.
In case of animals that lay unfertilized eggs there is almost no parental care of young ones.
So the statement A is correct and the statement B is not correct.
:
C
In viviparousanimals the embryo is implanted in the female body and it derives nourishment from the parent. These animals provide maximum care for the embryo, nourishing it until it grows into a fully formed fetus and givingbirth toyoung ones. For e.g. mammals. Embryonic care and protection is greatest in these animals, giving their offspring the highest chanceof survival.
Oviparous organisms like reptiles and birdslay fertilised eggs, here even though fertilisation is internal, embryogenesis is external. The eggs laid by these animals are protected by a hard calcareous shell and are laid in a safe place in the environment.
In case of animals that lay unfertilized eggs there is almost no parental care of young ones.
So the statement A is correct and the statement B is not correct.
Answer: Option D. -> All of the above
:
D
A gemma is a single cell, or a mass of cells, or a modified bud of tissue, produced asexually, that detaches from the parent and develops into a new individual. It is a common means of propagation in bryophytes, that is non-vascular plants like mosses and liverworts. And in pteridophytes like ferns and in some fungi and algae.
:
D
A gemma is a single cell, or a mass of cells, or a modified bud of tissue, produced asexually, that detaches from the parent and develops into a new individual. It is a common means of propagation in bryophytes, that is non-vascular plants like mosses and liverworts. And in pteridophytes like ferns and in some fungi and algae.
Answer: Option C. -> Gemma cups
:
C
The production of gemmae is a widespread means of asexual reproduction in both liverworts and mosses. In liverworts such as Marchantia, the flattened plant body or thallus is a haploid gametophyte with gemma cups scattered about its upper surface. The gemma cups are cup-like structures containing gemmae.
:
C
The production of gemmae is a widespread means of asexual reproduction in both liverworts and mosses. In liverworts such as Marchantia, the flattened plant body or thallus is a haploid gametophyte with gemma cups scattered about its upper surface. The gemma cups are cup-like structures containing gemmae.
Answer: Option C. -> Only statement II is correct.
:
C
In asexual reproduction, fusion of gametes do not takes place and asexual reproduction occurs in favourable conditions. As fusion of gametes do not takes place, all the individuals are genetically identical to each other.
:
C
In asexual reproduction, fusion of gametes do not takes place and asexual reproduction occurs in favourable conditions. As fusion of gametes do not takes place, all the individuals are genetically identical to each other.
Answer: Option D. -> i - d, ii - c, iii - b, iv - a
:
D
The lifespan of a butterfly is only 1-2 weeks, a crow around 15 years, tortoise 140 years and for a banyan tree up to 2500 years.
:
D
The lifespan of a butterfly is only 1-2 weeks, a crow around 15 years, tortoise 140 years and for a banyan tree up to 2500 years.
Answer: Option B. -> Parthenogenesis
:
B
In some organisms like rotifers, honey bees and even some lizards and birds (turkey), the female gamete undergoes development to form new organisms, male and/or female, without fertilisation. This phenomenon is called parthenogenesis.
Polyembryony is the formation of more than one embryo from a single fertilized ovum.
Parthenocarpy involvesformation of fruit without seed production.
Polygamy is a pattern of mating in which an animal has more than one mate.
:
B
In some organisms like rotifers, honey bees and even some lizards and birds (turkey), the female gamete undergoes development to form new organisms, male and/or female, without fertilisation. This phenomenon is called parthenogenesis.
Polyembryony is the formation of more than one embryo from a single fertilized ovum.
Parthenocarpy involvesformation of fruit without seed production.
Polygamy is a pattern of mating in which an animal has more than one mate.
Answer: Option A. -> Earthworm, tapeworm, leech
:
A
Earth worm, tape worm, leech, flat worm are hermaphrodites (bisexual). Bisexual refers to an organism having both male and female sex organs.
Sea horse, house fly, round worm and frog are unisexual animals. Unisexual refers to the organisms in which male and female reproductive systems are present in different individuals
:
A
Earth worm, tape worm, leech, flat worm are hermaphrodites (bisexual). Bisexual refers to an organism having both male and female sex organs.
Sea horse, house fly, round worm and frog are unisexual animals. Unisexual refers to the organisms in which male and female reproductive systems are present in different individuals
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