Xylem is one of the two types of transport tissue in vascular plants, phloem being the other. The basic function of xylem is to transport water from roots to shoots and leaves, but it also transports some nutrients.

AQIis a number used to communicate to the public how polluted the air currently is or how polluted it is forecast to become.

As AQI increases, an increasingly large percentage of the population is likely to experience increasingly adverse health effects.

Biofortification is the process by which the nutritional quality of food crops is improved through agronomic practices, conventional plant breeding, or modern biotechnology.

Kidney can be taken from a dying person who has the cessation of neurological function only.

Hence, option A is correct.

Quinine is obtained from the bark of the Cinchona tree. It is also synthesized in the laboratory. Quinine was the first effective treatment for malaria caused by Plasmodium falciparum. It is a natural white crystalline alkaloid.

A paramecium is a small one celled (unicellular) living organism that can move, digest food, and reproduce. The excretory aperture in paramecium is known as Cytopyge. Cytopyge is the anal orifice (cell “anus”) found in certain structurally complex protozoa, such as the rumen-dwelling ciliates of herbivores, through which waste matter is ejected.

The chicory powder is obtained from roasting the roots of chicory plant. It is mixed with coffee powder to reduce the bitterness of the plant.

A pacemaker is a small device that's placed in the chest or abdomen to help control abnormalheart rhythms.

The normal cholesterol level in human blood is 180 – 200 mg%. The National Cholesterol Education Program suggests that total blood cholesterol level should be:

< 200 mg/dL normal blood cholesterol.

200-239 mg/dL borderline-high.

> 240 mg/dL high cholesterol.

Hence, option D is correct.

Urine gets its yellow color from a pigment called urochrome. That color normally varies from pale yellow to deep amber, depending on the concentration of the urine. Darker urine is usually a sign that you're not drinking enough fluid.