301: Mouth and foot diseases in cattle are caused due to:
(a) Bacteria
(b) Virus
(c) Fungi
(d) Penicillium
302: It has been observed that after-effects of low temperature treatment are helpful in promoting the flowering in certain plants. Through this the vegetative period of plant becomes short and early flowering takes place. This phenomenon is known as
(a) Photoperiodism
(b) Floreignation
(c) Vernalisation
(d) Heliotropism
303: Which of the following pairs is/are correct?
(A) Main root : Storage
(B) Lateral root : Absorption
(C) Root hair : Conduction
(a) Only A
(b) A and C
(c) All are correct
(d) None of the above
304: Assertion (A):
Fatty acids should be apart of the balanced human diet.
Reason (R):
The cells of the human body cannot synthesize any fatty acids.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Explanation:
Few fatty acids cannot be synthesized by our body and are called Essential fatty acids. The most important of these is "Linoleic acid" (all vegetable oils contain linoleic acid, except coconut oil and palm oil).
305: The two branches of a plant give two different fruits :- tomatoes and brinjals. This can be explained:
(a) By nature's freak
(b) By grafting one with the other
(c) By hybridisation
(d) Both A and B