CBSE Guess > Papers > Question Papers > Class XII > 2006 > Biology > Outside Delhi Set -III
BIOLOGY— 2006 (Set III—Outside Delhi)
General Instructions: Same as in Set-I (Outside Delhi) 2006.
Note: Except for the following questions all the remaining questions have been asked in Set-I & Set-Il.
SECTION - B
Q. 6. Name the gland that functions as a biological clock in our body. Where is this gland located? Name its one secretion. (2)
Q. 7. Where are auxins generally produced in a plant? Name any one naturally occurring plant auxins and any one synthetic auxin. (2)
Q. 12. In what form do plants absorb magnesium from the soil? List any two magnesium deficiency symptoms in the leaves. (2)
SECTION - C
Q. 18. Briefly explain the principle and the function of haemodialysis (3)
Q. 22. Define ageing. Explain programmed senescence theory with reference to apopiosis (3)
Q. 23. What is in traspecific incompatibility or self-sterility in plants” Differentiate between sporophytic incompatibility and gametophytic incompatibility (3)
SECTION - D
Q. 28. What is meant by stoma? Name the group of plants, which contains fewer stomata on the upper surface of leaves. How does the absorption and loss of potassium ions in the guard cells bring about the opening and closure of the stomata? Explain. (5)
Describe the basic characteristics of a photosystem and explain how photosystem I differs from photosystem U. (5)
CBSE 2006 Question Papers Class XII