Christiaan Barnard, a South African cardiac surgeon, performed the world’s first successful humanto-human heart transplant at Groote Schuur Hospital, Cape Town on 3 December 1967. The recipient o heart transplant was Louis Washkansky, a fifty three year old grocer with a debilitating heart condition.

Correct Option: C

Christiaan Barnard, a South African cardiac surgeon, performed the world’s first successful humanto-human heart transplant at Groote Schuur Hospital, Cape Town on 3 December 1967. The recipient o heart transplant was Louis Washkansky, a fifty three year old grocer with a debilitating heart condition.

Hydroponics is a subset of hydroculture and is a method of growing plants using mineral nutrient solutions, in water, without soil. Terrestrial plants may be grown with their roots in the mineral nutrient solution only, or in an inert medium, such as perlite or gravel. Hydroponics is a subset of soilless culture.

Correct Option: A

Hydroponics is a subset of hydroculture and is a method of growing plants using mineral nutrient solutions, in water, without soil. Terrestrial plants may be grown with their roots in the mineral nutrient solution only, or in an inert medium, such as perlite or gravel. Hydroponics is a subset of soilless culture.

An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Plants are the most familiar type of autotroph, but there are many different kinds of autotrophic organisms. Algae, which live in water and whose larger forms are known as seaweed, is autotrophic.

Correct Option: B

An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Plants are the most familiar type of autotroph, but there are many different kinds of autotrophic organisms. Algae, which live in water and whose larger forms are known as seaweed, is autotrophic.

PPM is an abbreviation of Parts Per Million. It is commonly used as a measure of small levels of pollutants in air, water, body fluids, etc. Parts per million is the mass ratio between the pollutant component and the solution.

Correct Option: D

PPM is an abbreviation of Parts Per Million. It is commonly used as a measure of small levels of pollutants in air, water, body fluids, etc. Parts per million is the mass ratio between the pollutant component and the solution.

The acronym BCG stands for Bacillus Calmette– Guérin, a vaccine against tuberculosis and for the treatment of some bladder cancers. It is prepared from a strain of the attenuated (virulence-reduced) live bovine tuberculosis bacillus, Mycobacterium bovis. It is on the World Health Organization’s List of Essential Medicines.

Correct Option: A

The acronym BCG stands for Bacillus Calmette– Guérin, a vaccine against tuberculosis and for the treatment of some bladder cancers. It is prepared from a strain of the attenuated (virulence-reduced) live bovine tuberculosis bacillus, Mycobacterium bovis. It is on the World Health Organization’s List of Essential Medicines.