7th Grade > Biology
REPRODUCTION IN ORGANISMS MCQs
Total Questions : 118
| Page 1 of 12 pages
Answer: Option B. -> Male gametes
:
B
Pollen grains contain male gametes and are produced by anther.Themale gametefuses with the female gameteto produce zygote and eventually a new seed, during a process known as fertilization.
:
B
Pollen grains contain male gametes and are produced by anther.Themale gametefuses with the female gameteto produce zygote and eventually a new seed, during a process known as fertilization.
Answer: Option D. -> Mangrove
:
D
Seeds from plants such as dandelionsare light and have feathery bristles. They can be easily carried away to a long distanceby the wind. Whereas some plants, like drumstick and maple trees, have ‘winged’ seeds. These seeds don’t float away but flutter to the ground. Both drumstick and maple tree seeds are dispersed by thewind.
:
D
Seeds from plants such as dandelionsare light and have feathery bristles. They can be easily carried away to a long distanceby the wind. Whereas some plants, like drumstick and maple trees, have ‘winged’ seeds. These seeds don’t float away but flutter to the ground. Both drumstick and maple tree seeds are dispersed by thewind.
Answer: Option D. -> II, III and IV
:
D
Asexual reproduction produces new individuals without the fusion ofgametes. Offspring generated this way aregenetically identical to their parents. The types of asexual reproduction in plants are vegetative propagation, fragmentation and spore formation. Pollination is a phenomenon associated withsexual reproduction that involves the transfer of male gametes. Hence choices II, III and IV arecorrect.
:
D
Asexual reproduction produces new individuals without the fusion ofgametes. Offspring generated this way aregenetically identical to their parents. The types of asexual reproduction in plants are vegetative propagation, fragmentation and spore formation. Pollination is a phenomenon associated withsexual reproduction that involves the transfer of male gametes. Hence choices II, III and IV arecorrect.
Answer: Option C. -> one male and one female gamete
:
C
A male and a female gametefuse together during fertilisation toform a zygote. This is a characteristic feature of sexual reproduction and necessary for variation.
:
C
A male and a female gametefuse together during fertilisation toform a zygote. This is a characteristic feature of sexual reproduction and necessary for variation.
Answer: Option D. -> fertilisation
:
D
Fertilisation is the process in which fusion of female and male gametes occurs to form a zygote. Fruits and seeds develop only after fertilisation.
:
D
Fertilisation is the process in which fusion of female and male gametes occurs to form a zygote. Fruits and seeds develop only after fertilisation.
:
Each point: 1 Mark
Self PollinationCross Pollination(i)Transfer of pollen from the stamen to the pistil(i)Transfer of pollen from the stamen of one flower to the pistil of another flower ofof the same flowerthe same plant or different plants of the same kind(ii)External medium is not required(ii)External medium is required(iii)It occurs only in bisexual flowers(iii)It occurs in both unisexual and bisexual flowers
:
Each point: 1 Mark
1. Only one parent is involved.
2. It is quickerthan sexual reproduction.
3. No gametes are formed.
4. It does not involve fertilization.
5. There is no variation. Newly developed individuals are identical to their parents.
:
Each point: 1 Mark
Asexual ReproductionSexual Reproduction(i)One parent is involved(i)Two parents are involved(ii)New generation is identical or true copy of their parent(ii)New born are similar to their parents(iii)It doesn't require the formation of gametes(iii)It requires the formation of gametes
Answer: Option C. -> Self and cross-pollination
:
C
Bisexual flowers have both themale andfemale reproductive parts.This means they can pollinate themselves or another flower on the same plant (self-pollination) or pollinate anotherflower of the same species ofanother plant (cross-pollination).
:
C
Bisexual flowers have both themale andfemale reproductive parts.This means they can pollinate themselves or another flower on the same plant (self-pollination) or pollinate anotherflower of the same species ofanother plant (cross-pollination).
Answer: Option A. -> True
:
A
Ovariesdevelopinto fruits and ovulesinto seeds after fertilization. These fruitsare responsible for dispersing theseedsthat contain the embryo. They protect theseedsand help in the growth of a new plant.
:
A
Ovariesdevelopinto fruits and ovulesinto seeds after fertilization. These fruitsare responsible for dispersing theseedsthat contain the embryo. They protect theseedsand help in the growth of a new plant.
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