Advertisements
Advertisements
प्रश्न
Name the Following
Days in the human gestation period.
Advertisements
उत्तर
280 days
APPEARS IN
संबंधित प्रश्न
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.
Where is the female gamete formed in humans?
Write the names of male sex hormone?
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?
Define the following:
Implantation
Differentiate
Urinogenital system and Urinary system.
Choose the Odd One Out:
The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for ______.
Consider the following:
- The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis.
- The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.
- The first polar body is associated with the formation of the primary oocyte.
- Luteinising Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding.
Choose the correct answer from the options given below:
