Reproduction In Organisms(7th Grade > Biology ) Questions and Answers
Explanation:-
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.
Explanation:-
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.
Explanation:-
:
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
Explanation:-
:
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.
Explanation:-
:
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
Explanation:-
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).