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प्रश्न
What is the function of inner cell mass?
उत्तर
The ‘embryo proper’ develops from the inner cell mass.
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संबंधित प्रश्न
What do you mean by DNA?
How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals?
Why is variation beneficial to the species but not necessarily for the individual?
Which life process ensures that a plant or animal species will not disappear from this earth?
Name two animals which reproduce asexually.
Write down the different methods of asexual reproduction.
Match the organisms given in column I with the methods of reproduction/propagation given in column II :
| Column I | Column II | |
| (i) Plasmodium | (a) Spore formation | |
| (ii) Spirogyra | (b) Leaves | |
| (iii) Jasmine | (c) Regeneration | |
| (iv) Apple tree | (d) Budding | |
| (v) Bryophyllum | (e) Binary fission | |
| (vi) Potatoes | (f) Layering | |
| (vii) Rhizopus | (g) Fragmentation | |
| (viii) Hydra | (h) Tubers | |
| (ix) Planaria | (i) Cuttings | |
| (x) Leishmania | (j) Multiple fission | |
| (xi) Sugar cane | (k) Grafting | |
| (xii) Rose |
Why is variation during reproduction beneficial to the species but not necessarily for the individual?
Name two animals which undergo internal fertilisation?
State whether the following statement is true (T) or false (F):
Dogs and cats reproduce from two parents.
List any two different forms asexual reproduction.
Explain the role of DNA in the process of reproduction of the cell.
Give reason for the following:
Vegetative propagation is practised for growing only some type of plants.
Name the factors which take part in this process.
Multiple choice question.
Which of these is the male reproductive organ in humans?
Seminal fluid is ______ in nature.
Planaria reproduces asexually by ______.
What will happen if you cut planaria into small fragments?
Why is vegetative propagation practiced for growing some type of plant?
