reproduction
1. Union of gametes does not take place during
2. Two animals which lay eggs are
and
3. In human, fetilisation is
4. External fertilisation in frog takes place in
5. The zygote after repeated division gives rise to
6. The process of fusion of sperm with the egg is called
7. In the humans, sperms are produced by
8. Binary fission occurs in
while the eggs are produced by
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2. ostrich
8. hydra
7. testies
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- asexual reproduction
- Ducks and hens are best examples of oviparous organisms . Turtles are also the organisms which lay eggs. Fertilization may be external or internal in case of the animals laying eggs but eggs are hatched in external environment.
- Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. The result of this union is the production of a zygote cell, or fertilized egg, initiating prenatal development. ... The process of fertilization involves a sperm fusing with an ovum.
- External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water. After the sperm reaches the egg, fertilization can then take place. Typically, frogs lay eggs.
- The zygote further undergoes repeated divisions and gives rise to ball of cells that form groups and develops into different tissues and organs of body. This structure is called embryo.
- Fertilization occurs when the nucleus of both a sperm and an egg fuse to form a diploid cell, known as zygote. The successful fusion of gametes forms a new organism.
- In the sexually mature human male, sperm cells are produced by the testes (singular, testis); they constitute only about 2 to 5 percent of the total semen volume.
- Binary fission is the method of asexual reproduction in unicellular organisms. It is the process in which the parent divides into two daughter cells which are genetically and morphologically similar. During this process, the nucleus divides into two, followed by the division of the cytoplasm.
Explanation:
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