386: Which of the following diseases of milching animals are infectious?
1. Foot and Moth disease
2. Anthrax
3. Black Quarter
4. Cowpox
Select the correct answer using the code given below:
(a) 1, 2 and 3
(b) 1 and 4
(c) 2, 3 and 4
(d) 1, 2, 3 and 4
Explanation:
Foot and Mouth disease and Cowpox are virol diseases. Anthrax bacillus and clostridium chauvoei are the bacteria causing Anthrax (splenic fever) and Black quarter (black leg) incattle and sheep, respectively.
387: In the case of a Test-tube baby
(a) fertilization takes place inside the test-tube
(b) development of the baby taken place inside the test-tube
(c) fertilization takes place outside the mother's body
(d) unfertilized egg develops inside the test-tube
388: What is the tissue culture?
(a) Preparation of fragments of the cells of organism for biochemical examination
(b) Japanese culture
(c) Name given to a special type of surgery
(d) None of the above
389: Hydroponics means:
(a) Cultivation of plants without the use of soil
(b) Detection of sound in water
(c) Animals living in water
(d) A Japanese way of flowering
390: Which one of the following statements is not correct?
(a) The boiling point of an aqueous solution is higher than that of pure water
(b) Addition of solutes to a solution causes an increase in its water potential
(c) The vapour pressure of the water in a solution is lower than that of pure water
(d) When a solution is separated from water by a semi permeable membrane, water movement can be prevented by applying pressure to the solution
Explanation:
Addition of solutes to a solution causes a decrease in its water potential and increase in solute or osmotic potential.