286: With reference to normal human beings consider the following statements:
1. In response to the presence of HCL, secretian is produced from the duodenum
2. Enterogastrone is produced in the small intestine in response to the presence of fatty acids
Which of these statements is/are correct?
(a) Only 1
(b) Only 2
(c) Both 1 and 2
(d) Neither 1 nor 2
287: Milk fever in cows occurs due to the lack of:
(a) Phosphates
(b) Calcium
(c) Iron
(d) iodine
288: Consider the following kinds of organisms:
1. Bacteria
2. Fungi
3. Flowering Plants
Some species of which of the above kinds of organisms are employed as biopesticides?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Explanation:
Biopesticides have been defined as a form of pesticide based on micro-organisms or natural products.
Biopesticides fall into three major classes:
1) Microbial pesticides which consist of bacteria, entomopathogenic fungi or viruses
2) Biochemical pesticides which are naturally occurring substances in flowering plants that control pests.
3) Plant-incorporated protectants (PIPs) which have genetic material from other species incorporated into their genetic material (i.e. GM crops). Their use is controversial, especially in many European countries.
289: Gypsum is added to cement clinker to
(a) Increase the tensile strength of the cement
(b) Bind the particles of calcium silicate
(c) Decrease the rate of setting of cement
(d) Facilitate the formation of colloidal gel
290: After hatching by the hen, the young chicks come out of eggs within:
(a) One week
(b) Two weeks
(c) Three weeks
(d) Four weeks