(a) What is the life support system of a fetus ?
(b) How long does a human body take to develop before birth?
(c) What is the name of narrow opening between the uterus and the vagina.

(a) What are the after effects of the degradation of ozone ? (b) How does it affect human health ?

At what stage of development, does the human embryo gets implanted to inner lining of uterus

A particle is dropped from a tower 180 m high. How long does it take to reach the ground ? What is the velocity when it touches the ground ? Take g=10m//s^(2) .

(a) What is meant by human circulatory system ? Name the organs of the circulatory system in human (b) Draw a diagram of the human heart and lebel its parts (c) What is mean tby the terms 'single circulation' and 'double cirulation '?

A first order reaction is 40% complete after 8 min . How long will it take before it is 90% complete? What is the value of the rate constant?

(a) What job is done by the kidneys ? (b) What do kidneys excrete ? (c) What is the name of the tubes which connect the kidneys to bladder ? (d) What does the bladder in our body do ?

(i) How and at what stage does Plasmodium enter into a human body ? (ii) With the help of a flow-chart only show the stages of asexual reproduction in the life-cycle of the parasite in the infected human. (iii) Why does the victim show symptoms of high fever ?

(a) What is the function of our nervous system ? (b) What are the main organs of the human nervous system? Draw a labelled diagram to show the main organs of the human nervous system. (c) How does the human nervous system work? Explain.