Fertilisation of Ovum

Q. The fusion of the egg and sperm is called _______.

Q.

The cervix and the vagina have an acidic environment which kills most of the sperm.

1. True
2. False

Q.

Fertilized egg is also known as ____.

Q.

What is the difference between ejaculation and insemination?

Q.

Name the female reproductive organ in which the embryo gets embedded in.

Q. The zygote divides to form groups of cells that develop into different tissues and organs of the body. This developing structure is termed as ___.

Q. What is the difference between zygote and embryo ? (3)

Q.

Zygote develops into a/an ____.

Q. In humans, the motile germ cell is and the non - motile germ cell is.

1. pollen
2. ovum
3. ovary
4. sperm
5. testis

Q. Statement 1: Fertilisation results in the formation of zygote.

Statement 2: Zygote divides repeatedly to form a multicelled embryo.

1. Both the statements are correct.
2. Only statement 1 is correct.
3. Only statement 2 is correct.
4. Both the statements are incorrect.

Q. Which of the following gets embedded in the wall of the uterus for further development.

1. Zygote
2. Embryo
3. Egg
4. Foetus

Q.

Copper ions released from copper-releasing Intrauterine device (IUDs) -

1. Prevent ovulation

2. Make uterus unsuitable for implantation

3. Increase phagocytosis of sperms

4. Suppress sperm motility

Q. What happens when the sperm enters but ovulation doesn't take place and therefore there is no egg present to be fertilised

Q. How does sperm reach ovum?

Q.

Find the correct sequence of development of the offspring after fertilization.

1. Embryo -> zygote -> foetus -> blastocyst

2. Zygote -> blastocyst -> embryo -> foetus

3. Zygote -> embryo -> blastocyst -> foetus

4. Blastocyst -> zygote -> embryo -> foetus

Q. Question 27
Observe the following figures.
(a)

(b)

(c)

(d)

(i) Identify the stages in the figure during development of human baby.
(ii) Arrange the stages in correct sequence of development.
(iii) Explain the development that takes place in any one stage.

Q.

The male and female gametes unite to form

1. Zygote

2. Embryo

3. Foetus

4. None of these

Q.

State true or false. Fetus is the developmental stage of the embryo in which all the body parts can be identified.

1. TRUE

2. FALSE

Q. Assertion (A): Millions of sperms are produced by the testes.

Reason (R): All these sperms fuse with the ovum.

1. Only A is correct.
2. Only R is correct.
3. Both A and R are correct and R is the correct explanation for A.
4. Both A and R are correct but R is not the correct explanation for A.

Q. What is meant by gametes?

Q. Zygote form during reproduction in human is bicellular

Q.

The fusion of the egg and sperm is called _______.

Q.

The cervix and the vagina have an acidic environment which kills most of the sperms.

1. True
2. False

Q.

Find the correct sequence of development of the offspring after fertilization.

1. Embryo -> zygote -> foetus -> blastocyst

2. Zygote -> blastocyst -> embryo -> foetus

3. Zygote -> embryo -> blastocyst -> foetus

4. Blastocyst -> zygote -> embryo -> foetus

Q.

Though many sperms reach the oviduct, how many of them fuse with an ovum?

1. One

2. Two

3. Three

4. Four

Q.

The nutritive medium for the ejaculated sperms is given by

1. Seminal fluid

2. Vaginal fluid

3. Uterine lining

4. Fallopian tube

Q. What does and zygote evolves into and if i am right that it evolves into an embryo then embryo evolves into what ????

Q.

The egg and sperm fertilize to form a ___.

Q. Fetus is the developmental stage of the embryo in which all the body parts can be identified. State true or false.

1. True
2. False

Q. Tick the correct statements.

1. Sugar and salt intake should be limited during the phase of adolescence
2. Smoking promotes good health
3. The placenta nourishes the growing embryo
4. The body shape remains the same during adolescence