There are two types of fertilization: internal and external.
External fertilization and External Development: Parents release sperms and eggs into the surrounding water, where fertilization occurs and zygotes develop into offspring. For this pattern to succeed, male and female must shed their gametes at the same time and place and in large numbers, e.g. frogs.
Internal fertilization and External Development: Sperms are passed from the male into the female body. The fertilization takes place within the female body. The zygote, after its information, is surrounded by some secretions, reserve food and even a shell for development and protection of the growing embryo. The development of the chick takes place after the egg has been laid, e.g. hen.
Internal fertilization and internal Development: Both fertilization and development take place in the female body. This means that both, formation of the zygote and development of the young one take place inside the body of the female, e.g. human beings and elephant.
Animals that lays egg outside the body are called as oviparous animals(eg: chicken, frogs and butterfly) and animals that give birth to young ones are called as viviparous animals ( Human beings, certain fishes etc.)
In which of the following animals, external fertilization does not take place? | |||
Right Option : A | |||
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If fertilization does not take place corpus luteum will __________________ . | |||
Right Option : C | |||
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If fertilization does't occur, the ovum is released out of _____________________ | |||
Right Option : A | |||
View Explanation |
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