preboard 2065 of Himalayan whitehouse

Subject Biology FM 75
Grade XII PM 27
Time 3 hrs
Section A Zoology
1.
Answer all in very short
1x7=7

a.
What are Myoblasts?

b.
Who made the first attempt for test tube baby?

c.
Write the function of Coweper’s gland.

d.
Define human population growth rate.

e.
What do you mean by total lung capacity?

f.
Define accomadation of an eye.

g.
What is arteriosclerosis?




2.
Answer all in brief
3x5=15

a.
Draw a line sketch to show different types of connective tissues

b.
An organ transplantation is more complicated than the tissue transplantation. Discuss.

c.
Describe the gastric digestion in man.

d.
Discuss the structure and functions of cochlea.

e.
Give an account of adrenal cortex.




3.
Explain the formation of coelom in frog
7.5

4.
Describe the mechanism of Urine formation in man.
8

OR


Discuss the causative agent, made of transmission , symptoms diagnosis, treatment and preventive measures of Typhoid.


Section B Botany
1.
Answer all in very short 1x7=7
1x7=7

a.
What is secondary growth?

b.
Define nyctinasty.

c.
What is a homozygous organism?

d.
Name the diploid nucleus formed inside an embryo sac.

e.
Discuss the application of fermentation technology in food industry.

f.
What do you understand by syngamy?

g.
Define micropropagation.




2.
Answer in brief.
3X5=15

a.
Explain the law of independent assortment.

b.
Discuss the factors responsible for changing gene frequency.

c.
Write about he importance of transpiration.

d.
How is layering done in strawberry?

e.
Discuss the application of fermentation technology in food industry.




3.
Describe the internal structure of monocot root with the help of a neat, well labeled diagram. Point out its differences with that of dicot root.
7.5

OR


Explain various steps of Kreb’s cycle and point out its end products.

4.
Define polyploidy. Describe its types and mention its significance.
8