Explanation

In assessing the prevalence of protein-energy malnutrition the most practical indicator would be weight for height.

This measurement provides a quick and reliable assessment of acute malnutrition,

as it reflects recent weight changes relative to height. 

Explanation

"Pakistan's polio immunization campaign began in 1974, but eradication efforts officially started in 1994.

The country had the most polio cases worldwide in 2014."

Explanation

Antonie van Leeuwenhoek is credited with the discovery of bacteria.

In 1676, using a primitive microscope, he observed and described microorganisms.

Including bacteria and protozoa, which he referred to as "animalcules".

Explanation

Iron is essential for the formation of hemoglobin.

About 70 percent of your body's iron is found in the red blood cells of your blood called hemoglobin and in muscle cells called myoglobin.

Explanation

An extinct species has no living individuals left anywhere on Earth.

Endangered and threatened species are still alive but at risk of extinction.

Explanation

A vector is a DNA molecule used to carry a gene of interest into a host cell for cloning.

Common vectors include plasmids, bacteriophages, and cosmids.

Explanation

The atmosphere is the gaseous layer that surrounds the Earth.

It is composed mainly of nitrogen, oxygen, and trace gases.

It plays a crucial role in protecting life on Earth by filtering harmful radiation and regulating temperature.

Explanation

Stomach wall secretes pepsin, which begins protein digestion.

Pancreas releases trypsin and chymotrypsin into the small intestine to further break down proteins.

Explanation

Centrioles are present only in animal cells.

They are involved in cell division (spindle formation).

Higher plant cells typically lack centrioles and instead organize their spindle fibers differently.

Explanation