Fertilization

Q. Question 7
In human beings, after fertilization, the structure which gets embedded in the wall of uterus is

(a) Ovum
(b) Embryo
(c) Foetus
(d) Zygote

Q.

The number of eggs produced in internal fertilisation is _____ than external fertilisation.

1. equal to

2. more

3. less

4. ten times more

Q. ______ is the process by which a male and female gamete fuse together to form a ______.

1. Fertilization, embryo
2. Fertilization, zygote
3. Embryogenesis, zygote
4. Implantation, embryo

Q. The process of fusion of the male and the female gametes is called

1. Fertilization
2. Pollination
3. Reproduction
4. Seed formation

Q. Question 11
Although 2 cells called gametes fuse, the product formed is a single cell called zygote. Justify.

Q. Sexual reproduction involves the fusion of male and female ______

1. gametes.
2. zygote
3. tissue
4. organs

Q. Question 25

After observing the figure answers the following.
a. Read the following statements and label them in the figure:
(i) The part which produces female gametes.
(ii) The part where the development of the baby takes place.
(iii) The part through which the developing embryo passes to reach the uterus.
b. Explain the future development of the embryo that would take place after it gets embedded in the uterus.

Q. Read the given statements
A. IVF is a treatment for infertility when a woman is able to produce ovum, however, problems of the Fallopian tube makes fertilization difficult.
B. Asexual reproduction is a rapid and easier method of multiplication.
C. Unicellular organisms reproduce by binary fission are referred to as ‘immortals’ because the actual death of the parent does not occur.
D. Metamorphosis is the transformation of an adult animal to larval form.
Which of the given statements are correct?

1. B, C and D
2. B and D
3. A, B, C and D
4. A, B and C

Q.

The process of fusion of male gamete with a female gamete is called __________.

Q. Pollen tube grows from the and reaches the in the ovary where fertilisation takes place.

1. filament
2. anther
3. stigma
4. ovule

Q. The fusion of male and female gametes is termed as .

Q.

State the functions of the following:

Placenta

Q.

Give differences between a zygote and a foetus. [2 MARKS]

Q.

Given below is an example of certain structure and its special functional activity.

For example Eye and vision on a similar pattern complete the following

Placenta and ________

Q. In humans, the development of fertilized egg takes place in the ___.

Q. Which among the following is the function of stigma?

1. To receive the pollen grains
2. To attract insects
3. To protect the anther
4. To hold up the style