Sexual Reproduction

Q. Which of the following is not true for asexual reproduction?

1. No formation of gametes
2. No fusion of gametes
3. New generation is identical to parents
4. Male and female parent are involved i.e. biparental

Q.

Is mitosis involved In asexual reproduction?

Q. Which of the following is not a characteristic of sexual reproduction?

1. Biparental
2. Accounts for variation
3. Genetically different from parents
4. No fertilisation

Q.

What is the other name of sex cells ?

Q.

Why do frogs lay eggs in hundreds ?

Q. Which of the following organisms reproduce asexually?

1. Hydra
2. Human
3. Paramecium
4. Dogs

Q. Why is that dog produces several puppies at a time whereas human being usually produces only one child at a time?

Q.

Give two reasons for the appearance of variations among the progeny formed by sexual reproduction.

Q. What is reproduction and what are its types?

Q. How does reproduction takes place in star fish

Q.

Which of the following organisms can reproduce sexually?

1. Amoeba

2. Frog

3. Hydra

4. Planaria

Q.

State whether the following statements are true or false :

(a) Each sperm is a single cell.

(b) A new human individual develops from a cell called gamete.

(c) Egg laid after fertilisation is made up of a single cell.

(d) A zygote is formed as a result of fertilisation.

(e) External fertilisation takes place in frog.

(f) An embryo is made up of a single cell.

(g) Oviparous animals give birth to young ones.

(h) Oviparous animals give birth to young ones.

(i) The hens give birth to chicks like human beings give birth to babies.

(j) Amoeba reproduces by budding.

(k) Binary fission is a method of asexual reproduction.

(l) Fertilisation is necessary even in asexual reproduction.

(m) Cloning is a sexual reproduction method in mammals.

Q.

Characters that are transmitted from parents to offspring during reproduction show

1. only similarities with parents

2. only variations with parents

3. both similarities and variations among parents

4. neither similarities nor variations

Q.

Which of the following organisms can reproduce sexually?

1. Amoeba

2. Frog

3. Goat

4. Planaria

Q.

Why do organisms reproduce?

Q. What is cloning? How it is done?

Q.

Why are the offsprings produced during asexual reproduction called daughter cells?(2marks)

Q. The importance of reproduction in organisms is

1. Production of young ones
2. Carry on their generation
3. Increase the population
4. Production of new species

Q. Select the incorrect statement about reproduction in animals.

1. All animals reproduce by laying eggs.

2. Organisms reproduce through asexual and sexual reproduction.

3. Reproduction is one of the basic life processes.

4. Reproduction is essential for the continuation of the species.

Q.

What happens to the following after fertilization?

Petals

Q. Which of the following is not a characteristic of sexual reproduction?

1. Biparental
2. Accounts for variation
3. Genetically different from parents
4. No fertilisation

Q.

What are the two general methods of reproduction in organisms ?

Q.

Do all animals give birth to individuals like humans ?

Q. "New individual inherits some characteristics from the mother and some from the father." This type of reproduction is called as

1. Metamorphosis
2. Regeneration
3. Asexual reproduction
4. Sexual Reproduction

Q.

The attachment of the embryo to the uterus wall is called

1. fertilisation

2. implantation

3. gestation

4. germination

Q.

Explain the difference between pregnancy and gestation in detail with diagram.

Q.

Give five examples each of animals which develop:

(a) inside the mother.

(b) inside eggs which are the mother lays.

Q.

Describe the various steps involved in the sexual reproduction in animals.

Q. Give five examples each of the animals which develop:
(b) inside eggs which the mother lays.

Q.

Reproduction is essential for living organisms in order to

1. keep the individual organism alive

2. fulfil their energy requirement

3. maintain growth

4. continue the species generation after generation