Which is an example of genetic engineering?
a. humans’ ability to digest cow milk
b. some bacteria’s resistance to antibiotics
c. golden rice enriched with vitamin a
d. lizards with longer legs for surviving floods

The correct answer would be C. golden rice enriched with vitamin A.

Genetic engineering refers to the set of techniques involved in the manipulation of genetic material of an organism.

It includes isolation, modification, and the introduction of the gene of interest in an organism.

It usually aims to modify or introduce characters of interest in an organism.

For example, pest resistant varieties of fruits and vegetables (Bt cotton), increased nutrient contents of a particular food (golden rice), insulin production through bacteria et cetera.

Golden rice is a genetically engineered variety which is produced by introducing three foreign genes required for synthesis and storage of beta-carotene into the plant.

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

a- all cells come from pre-existing cells