PRELIM EXAMINATION I
CLASS XII BIOLOGY
MAX. MARKS: 70 TIME: 3 HRS
NAME____________ CLASS_____SECTION__________ ROLL NO.
This paper comprises of two Parts- I and II. Answer all Questions.
PART I (20 Marks)
Q.1 (a) Answer the following as per instructions (Attempt all questions) : [8x1]
i)Give the scientific term for preservation of germplasm at very low temperature.
ii)How does Global Warming pose a threat to coastal areas?
iii)Define Apomixis.
iv)What do detritus food chains begin with?
v)How many chromosomes are present in the meiocytes of a fruit fly?
vi)Name the antibody which is most effective in allergies.
vii)Name the diagnostic test for AIDS.
viii)What is the function of GEAC?
b)State the best known contributions of the following: [4x1]
i) Edward Jenner ii) P. Maheshwari
iii)Meselson and Stahl vi) T.R. Malthus
c) Define the following: [2x1]
i) Symbiosis ii)Recon
d) Give reasons for the following: [2]
i) Clown fish and sea anemone tend to pair up in their natural habitat.
ii) The human species is the major cause of extinction of many species.
e)Multiple choice questions. Choose the best option in each case: [4x1]
(i)Typhoid is classified as a:
I. viral disease II. genetic disease
II. bacterial disease IV. protozoan disease
CLASS XII BIOLOGY
MAX. MARKS: 70 TIME: 3 HRS
NAME____________ CLASS_____SECTION__________ ROLL NO.
This paper comprises of two Parts- I and II. Answer all Questions.
PART I (20 Marks)
Q.1 (a) Answer the following as per instructions (Attempt all questions) : [8x1]
i)Give the scientific term for preservation of germplasm at very low temperature.
ii)How does Global Warming pose a threat to coastal areas?
iii)Define Apomixis.
iv)What do detritus food chains begin with?
v)How many chromosomes are present in the meiocytes of a fruit fly?
vi)Name the antibody which is most effective in allergies.
vii)Name the diagnostic test for AIDS.
viii)What is the function of GEAC?
b)State the best known contributions of the following: [4x1]
i) Edward Jenner ii) P. Maheshwari
iii)Meselson and Stahl vi) T.R. Malthus
c) Define the following: [2x1]
i) Symbiosis ii)Recon
d) Give reasons for the following: [2]
i) Clown fish and sea anemone tend to pair up in their natural habitat.
ii) The human species is the major cause of extinction of many species.
e)Multiple choice questions. Choose the best option in each case: [4x1]
(i)Typhoid is classified as a:
I. viral disease II. genetic disease
II. bacterial disease IV. protozoan disease
