Sperms have to enter the female reproductive passage, and fertilise the ovum by travelling through the vagina and uterus to reach the fallopian tube. This is the reason why sperms need to have mobility.

The reproduction in amoeba takes place by binary fission. In this process amoeba reproduces by dividing into two individuals. The nucleus of amoeba cell is divided into two. This is followed by division of its body into two, each part receiving a nucleus. Finally two amoebae are produced from one parent amoeba.

Male reproductive system: The male reproductive organs include a pair of testes, two sperm ducts and a penis. The testes produce the male gametes called sperms. Millions of sperms are produced by the testes

IVF is In-vitro fertilization. In such cases doctor collects freshly released egg and sperms and keeps them together for a few hours for fertilization. When fertilization occurs, the zygote is formed and allowed to develop for about a week and then, it is placed in the mother's uterus. Babies produced through this technique are called test-tube babies.

After fertilization, the zygote divides repeatedly and travels down the oviduct. As it travels down, many protective layers are formed around it. The hard shell is formed around the developing embryo. The hen finally lays the egg

Amoeba reproduces by asexual reproduction, binary fission. It begins the process of reproduction by the division of its nucleus into two nuclei. This is followed by division of its body into two, where each part receives a nucleus. Finally two amoebae are produced from one parent amoeba.

Birds are oviparous, lay eggs outside the female body, so their eggs are available in market, while dogs are viviparous, i.e., do not lay eggs but give birth to young ones

The sperms swim in the oviduct with the help of their tails to reach the egg.

(i) Examples of viviparous animals Mammals like cat, dog, camecow, dog.
(ii) Examples of oviparous animals All birds, fishes, reptiles, amphibians.

Male gametes or sperms have tail to facilitate movement of sperms and help them to reach the egg (female gamete) for fertilisation.

Group X- Lays eggs in water Group Y- Lays eggs on land.

Organisms like honeybees, birds (turkey) and some lizards are reproduce by parthenogenesis.

Embryo grows outside in open in case of external fertilisation.

Internal fertilisation takes place in a hen.

The period between fertilisation and childbirth is called gestation.

The process of fertilisation that takes place outside the body of the female is called external fertilisation.

Birds are oviparous, lay eggs outside the female body, so their eggs are available in market, while dogs are viviparous, i.e. do not lay eggs but give birth to young ones.

Sexual reproduction involves gametes.

The babies born through IVF technique are called test-tube babies.

Fallopian tubes is the other name of oviducts.

X-Frog; Y-Butterfly

No, humans do not undergo metamorphosis.

Human beings reproduce by sexual method.

Metamorphosis is the term used for the change from tadpole to frog.

Frog's eggs are without any external covering or shell but a layer of jelly-like coat hold the eggs together, thus providing them protection.

The name of the organism is Hydra and mode of reproduction is asexual (budding).

The mixture of secretions from various glands like seminal, prostrate and cowpers gland along with sperms is called semen.

The phenomenon by which female gametes produce off spring without fertilisation is called parthenogenesis.

The male sex hormone is testosterone.

Bud is the term used for the bulges observed on the sides of the body of Hydra.

Egg is the reproductive cell produced in a woman's ovary while sperm is the reproductive cell that is produced in the testes of a man.

Testes produce sperms in humans.

Zygote, embryo and foetus.

The stages in the life cycle of silkworm occursin following sequence:
Egg ⟶ Caterpillar ⟶ Pupa ⟶ Silkmoth
This drastic change in structure from caterpillar to silkmoth is called metamorphosis.

Two main types of reproduction prevalent in animals are asexual and sexual reproduction.

The statement made by Akash is a correct statement about reproduction.

Yes, there are organisms that have both male and female reproductive organs in the same body, e.g. earthworm, leech.

Yes, it has a specific function. The tail in sperm provides motility to it and helps it to reach female gemetes for fusion.

Reproduction is the biological process of formation of young ones of their own kind by living organisms.

Hydra (multicellular) and Amoeba (unicellular) are two animals which can reproduce by asexual methods.

In human beings, male gamete is known as sperm and female gamete as egg or ova.

A fertilised egg is also called zygote.