Late blight of potato is caused by
Ustilago
Pseudomonas
Phytophthora infestans
Colletotrichum falcatum
Most accepted theory for ascent of sap is
capillarity theory
root pressure theory
pulsation theory
transpiration pull theory
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
Which compound has very important role in prebiotic evolution ?
SO2
NO
CH4
SO3
C.
CH4
J B S Haldane used the term Prebiotic soup or Hot Dilute Soup of Organic substances. He used this term for oceanic water containing mixture of simple organic compounds. Methane (CH4) was the first organic compound and hydrogen cyanide.
The trisomy for 21st chromosome is called
Down's syndrome
Turner's syndrome
Sickle cell anaemia
Klinefelter's syndrome