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Question 1

What is reproduction?

Reproduction is the biological process by which new individual organisms are produced.

Reproduction is a fundamental feature of all known life.

Each individual organism exists as the result of reproduction.

Question 2

What are the modes of reproduction ?


There are two modes of reproduction are sexual and asexual.


Question 3

Explain about male reproduction

The human male reproductive system is composed of a pair of testes, two sperm ducts, and a penis.

In adult males, each testis produces million of sperms which is the male

Question 4

Explain about female reproduction


The female reproductive system consists of

two ovaries,

two oviducts (uterine tubes),

the uterus.

Question 5

What is in vitro fertilization?

In vitro fertilization (IVF) is a process by which egg cells are fertilized by sperm outside the woman's womb, in vitro.

IVF is a major treatment in infertility, in case of blockage of oviduct in women.

The process involves, removing ova (eggs) from the woman's ovaries and letting sperm fertilize them in a fluid medium.

The fertilized egg (zygote) is then transferred to the woman’s uterus with the intent to establish a successful pregnancy.

Babies born through this technique are called as test -tube babies

Question 6

Write about the developmental stages in chicken



In case of hen fertilization is internal
The zygote formed travels down the oviduct as it travels down the oviduct protective layers are formed around the egg

A hard shell is formed around the egg

After the egg is laid it takes at least 3 weeks for the embryo to develop into a chick

The embryo develops inside the egg shell

The chick provide sufficient warmth to the egg


Question 7

Write a note on cloning

Cloning is the process of making a genetically identical organism through nonsexual means

It has been used for many years to produce plants (even growing a plant from a cutting is a type of cloning).

Animal cloning has been the subject of scientific experiments for years, but garnered little attention until the birth of the first cloned mammal in 1997, a sheep named Dolly.

Since Dolly, several scientists have cloned other animals, including cows and mice.

The recent success in cloning animals has sparked fierce debates among scientists, politicians and the general public about the use and morality of cloning plants, animals and possibly humans.

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