41.

Late blight of potato is caused by

• Ustilago

• Pseudomonas

• Phytophthora infestans

• Colletotrichum falcatum

Leaf abscission is caused by

• ABA

• cytokinin

• auxin

• gibberellin

Most accepted theory for ascent of sap is

• capillarity theory

• root pressure theory

• pulsation theory

• transpiration pull theory

Which enzyme converts glucose into alcohol ?

• Zymase

• Diastase

• Invertase

• Lipase

Who coined the term antibiotics ?

• Woodruff

• Darwin

• Selman Waksman

• A Fleming

Male Anopheles does not transmit malarial parasite because

• it catches fever

• it is too small to carry parasite

• the parasite is killed in its stomach

• it does not drink blood

Ovulation takes place in a month between

• 11-14 day

• 14-16 day

• 15-28 day

• 21-26 day

The cranial capacity of Peking man was about

• 900 cc

• 1660 cc

• 1075 cc

• 1450 cc

Which compound has very important role in prebiotic evolution ?

• SO₂

• NO

• CH₄

• SO₃

The trisomy for 21^st chromosome is called

• Down's syndrome

• Turner's syndrome

• Sickle cell anaemia

• Klinefelter's syndrome