Explanation

Measles is one of the world's most contagious diseases

It spread by contact with infected nasal or throat secretions (coughing or sneezing) or breathing the air that was breathed by someone with measles.

The virus remains active and contagious in the air or on infected surfaces for up to two hours.

Explanation

Paleontology is the branch of science concerned with the study of fossils and the history of life on Earth

Fossils are the remains of plants, animals, fungi, bacteria, and single-celled living things

that have been replaced by rock material or impressions of organisms preserved in rock.

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Explanation

According to Newton's second law, 

F=ma, a constant non-zero force results in uniform acceleration of the mass.

Explanation

Oximeter is used to measure the oxygen level in blood & heart rate. 

Pulse oximeters can be attached to your fingers, forehead, nose, foot, ears or toes.

The device may then be reused or disposed of.

Explanation

The plants and vegetation of a region are collectively known as flora.

Flora refers to the plant life occurring in a particular region or time. 

Explanation

Two or more forces acting on the same point at the same. time are called concurrent forces.

While

A concurrent coplanar force system is a system of two or more forces whose lines of action intersect at a common point.

Explanation

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

 Coal gas composition:

Typically contains around 50% hydrogen, 35% methane, and 10% carbon monoxide. 

Production method:

Coal is heated in the absence of air to produce these gases. 

Explanation

Bryophytes are a group of non-vascular plants, which include mosses, liverworts, and hornworts.

They are characterized by their lack of vascular tissue (xylem and phloem) and reproduce via spores instead of seeds.