Fertilisation in Humans

Q. Which of the following stores and transports sperm to the ejaculatory duct?

1. Vas deferens
2. Uterus
3. Urethra
4. Penis

Q. What is placenta ? Describe its structure. State its functions in case of a pregnant human female.

Q.

The disc like tissue embedded in the uterine wall which provides nutrition to the embryo within the womb is known as

1. Placenta

2. Cervix

3. Ovary

4. Umbilical cord

Q.

Name the following:
The structure which connects the placenta and foetus

Q.

An embryo is made up of a single cell.

1. True
2. False

Q.

Question 6
In human males, all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are

(i) Large chromosome
(ii) Small chromosome
(iii) Y-chromosome
(iv) X-chromosome

(a) (i) and (ii)
(b) (iii) only
(c) (iii) and (iv)
(d) (ii) and (iv)

Q.

Fertilisation is the fusion of sperm and ovum.

1. True

2. False

Q.

Identify the part labelled [x] in the diagram.

1. placenta

2. uterus

3. villi

4. cilia

Q. The human males have sex chromosomes.

1. XX
2. XY
3. XO

Q.

Name the following:
Fixing of developing zygote on the uterine wall.

Q.

What specific chromosome do females have?

Q. Give scientific reasons.(Any Two)

1. Peripatus is said to be the connecting link between annelida and arthropoda.
2. Fertilization in plants is called double fertilization.
3. Nowadays school children have to deal with mental stress.

Q.

What is placenta?

Is this answer correct?👇👇👇✔

Placenta is a tissue made of blood that develops around the growing embryo in the uterus.

Q.

How does the embryo get nourishment inside the mother’s body?

Q.

How does embryo get nourishment inside the mothers body

Q.

Name the following
The period of intrauterine development of embryo.

Q. What changes occur to help the develop embryo in the mother? What is a placenta?

Q. Explain how the embryo gets nourishment inside the mother's body.

Q. During fertilisation, fusion of egg and sperm form a single cell having two nuclei.

1. True
2. False

Q.

Is the placenta attached to the mother?

Q. Which of the following are the functions of placenta?

1. Facilitates removal of carbon dioxide and waste material from embryo
2. Facilitates supply of oxygen and nutrients to embryo
3. It forms the major part of the tube like structure umbilical cord.
4. Protects the foetus from minor mechanical injury.

Q. What is the correct sequence of events during reproduction in human beings?

1. Gamete formation $\to$ fertilisation $\to$ zygote $\to$ embryo
2. Embryo $\to$ zygote $\to$ fertilisation $\to$ gamete formation
3. Fertilisation $\to$ gamete formation $\to$ embryo $\to$ zygote
4. Gamete formation $\to$ fertilisation $\to$ embryo $\to$ zygote

Q.

Traits found in males are due to the presence of __ chromosome.

Q. During fertilisation, fusion of egg and sperm form a single cell having two nuclei.

1. True
2. False

Q. How does embryo gets nourishment inside the mother's body?

Q. In humans, females have ___ sex chromosomes and males have ___ sex chromosomes.

1. AA and AB
2. XX and XY
3. XY and XX
4. ZW and ZZ

Q. Where does the fertilization occur in human females?

1. 
   Uterus
2. 
   Oviduct
3. 
   Vagina
4. 
   Cervix

Q.

Which chromosome is contributed by the sperm during fertilization?

1. X

2. Either X or Y

3. Y

4. None of the above

Q. Arrange the following steps in order.

i. Sperms survive for a short period in the vagina's acidic secretions.
ii. The sperms travel through the uterus followed by the fallopian tube.
iii. The sperms which survive reach the cervix.
iv. The sperms then reach the egg for fertilization.

1. i - ii - iii - iv

2. iv - iii - ii - i

3. i - iii - ii - iv

4. iv - ii - iii - i

Q. Sort the path travelled by the sperm in the female reproductive tract.

1. Cervix
2. Uterus
3. Vagina
4. Fallopian tube