1201. During formation of bread, the product that ‘raises’ the bread is _________.

A. Yeast *
B. Bacteria
C. Carbon Dioxide
D. Water

1202. Ageing in human beings is caused by disapperance of which of the following glands ?

A. Thyroid
B. Thymus *
C. Pituitary
D. Parathyroid

1203. Antigen is a substance which __________.

A. Lowers body temperature
B. Destroys harmful bacteria
C. Triggers the immune system *
D. Is used as an antidote to poison

1204. The unit of energy produced by food in the human body is called _________.

A. Watt
B. DNA
C. Calorie *
D. Ampere

1205. The persons whose blood has a reduced capacity of delivering oxygen to tissues suffer from _________.

A. Haemophilia *
B. Sickle cell anaemia
C. Haemophilias
D. Anaemia

1206. Who among these was produced by genetics engineering ?

A. Jersey-sahiwal cow
B. Dhani ox
C. Nacy sheep
D. Rahu-thaila carp *

1207. Which one of the following is produced by hybridization and selective breeding ?

A. Neeli-Ravi Buffalo *
B. Rahu-Thaila hybrid
C. Sahiwal ox
D. All these

1208. Which one of the following is heredity disease?

A. Polio
B. Cholera
C. Typhoid
D. Hemophilia *

1209. Colorblind person cannot distinguish red from ___________.

A. Yellow
B. Blue
C. Green *
D. White

1210. Who proposed theory of continuous and gradual evolution of life from simple to complex ?

A. Aristotle *
B. Hugo de vries
C. Thomas malthus
D. Charles lyell