Which of the following is not a characteristic of a plane?
it cannot be seen
it is imaginary
its width can be measured
it is infinite
none of the above

Answer : Its width can be measured

Explanation:

The width of a plane can be measured is not a characteristic of plane.

The properties of a plane include:

Option (3)

Explanation:

A plane generally refers to a two-dimensional line that helps in identifying a particular feature. It has no definite length. These are simply imaginary lines.

It does not have any specific length, breadth or height, so the width of a plane is impossible to measure.

These planes can be numerous in number and they can be oriented in a horizontal or vertical manner. Sometimes they are inclined too. But they can also be parallel to one another or it can be intersecting at one common point.

Thus, the correct answer is option (3).

a

explanation:

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'