Advertisements
Advertisements
प्रश्न
Write the functions of the following organs of reproduction:
a. Ovaries
b. Seminal vesicle and prostate glands
उत्तर
(a) Functions of ovaries:
a. They produce eggs.
b. The eggs are released from the ovaries by the process of ovulation.
c. The ovaries also secrete the female sex hormone oestrogen, which brings about changes in girls at the time of puberty.
(b) Functions of seminal vesicle and prostate glands:
a. They produce the ejaculatory fluid.
b. This fluid helps in the transport of sperms and provides nutrition to the sperms.
APPEARS IN
संबंधित प्रश्न
Describe, in brief, the changes the uterus undergoes
(i) to receive the zygote.
(ii) if zygote is not formed
What is placenta?
List two example of each diseases caused due to (i) bacterial infection and (ii) viral infection. Which device or devices may be used to prevent the spread of such diseases.
Describe in brief what happens to the zygote after it gets implanted.
If a woman is using a copper-T, will it help in protecting her from sexually transmitted diseases?
What are the different methods of contraception?
Write the function of the following part in a human female reproductive system:
Uterus
Give appropriate biological/technical terms for the following:
The kind of twins formed from two fertilized eggs.
the Biological/technical term for The canal through which the testes descend into the scrotum just before the birth of a male baby
Give scientific reasons: Mature erythrocytes in humans lack nucleus and mitochondria
fill in the blanks with suitable functions: Seminiferous Tubule and _____
Give biological explanations for The placenta is an important structure for the development of a foetus
What are the organs in humans which produce the gametes?
Which part of the human body produces ova?
What do the testes in a man produce?
Why does menstruation occur? Describe the menstrual cycle in human females (or women).
What is the role of seminal vesicles and prostrate gland in human male reproductive system?
Where does fertilisation take place in human females?
What is meant by implantation?
Which of the following is not a sexually transmitted disease?
(a) gonorrhoea
(b) hepatitis
(c) syphilis
(d) AIDS
In human females, an event that indicates the onset of reproductive phase is :
(a) growth of body
(b) change in hair pattern
(c) change in voice
(d) menstruation
The normal body cell of an organism contains 28 pairs of chromosomes. The number of chromosomes present in its germ cell will be
(a) 28
(b) 14
(c) 56
(d) 42
When a fertilised egg E formed in the oviduct of a human female divides repeatedly to form an embryo, the embryo gets implanted in the thick and soft lining of the uterus. After this a disc-like special tissue T develops between the uterus wall and embryo through which all the requirements of the developing embryo (and foetus) are met from the mother's body, The embryo is connected to the tissue T through a string like structure S.
(a) What is the other name of fertilised egg cell E?
(b) What is the name of tissue T?
(c) Name the string-like structure S.
(d) Name two substances which pass from mother's blood to embryo through tissue T and, one type of substance which passes from embryo to mother's blood.
(e) What happens to S when the baby is born? Why?
The germ cell A produced by a person X is round in shape and it fuses with another germ cell B having a long tail and produced by a person Y. The fusion of A and B produces a new cell C. The cell C divides repeatedly and grows inside the organ D of person X to form E in which the body features of the unborn baby are not much developed. E grows further to form F in which the various body features of the unborn baby (like hands, legs, head, eyes, and ears, etc.) can be identified. F grows further and ultimately forms a baby. What are A, B, C, D, E and F? Out of the two persons X and Y, which one is male and which one female?
Write two examples of sexually transmitted diseases caused by bacteri.
Explain how the transmission of virus and bacteria diseases be prevented?
Describe in brief the role of vas deferens in human male reproductive system.
Define the term puberty.
In male and female reproductive system of human, ______ gland is same.
Give the names.
Any two sexual diseases.
Gender of child is determined by the male partner of couple. Explain with reasons whether this statement is true or false.
State whether the following statement is true or false:
Oviducts and fallopian tubes are one and the same thing.
Choose the correct answer:
The aim of sexual reproduction _________
Define the following:
Parthenogenesis
Define the following:
Asexual reproduction
Rewrite the following terms in a correct and logical sequence:
The luteal phase, follicular phase, menstrual phase, ovulatory phase.
State the Location:
Prostate gland
Choose the Odd One Out:
Mention the importance of the position of the testes in humans.
Correct sequence in development is ______.
