Explanation

 The wave nature of light was primarily proposed by Christian Huygens.

Explanation

 In the sentence:

I met a traveler from an antique land

The word "antique" refers to something very old or ancient, typically from a distant past.

So:

Antique land = Ancient land (a place from ancient history)

Explanation

 Miss McCutcheon wanted to quit and go back home.

The word "quit" means to stop trying or give up.

So the phrase "wanted to quit" is best matched with Give up

Explanation

Circinate vernation, a term in botany, describes the arrangement of young leaves in a coiled or spiralled manner, characteristic of fern fronds. This coiled structure, often resembling a crozier or fiddlehead, protects the tender growing tip of the leaf as it matures. 

Explanation

Carbon has 4 electrons in its outer shell.

It forms 4 covalent bonds, making it tetravalent (valency = 4).

Explanation

Explanation

 "Took" is the correct past tense of the verb "take," which is appropriate for the sentence.

Explanation

The kinetic energy is mathematically expressed as K. E=12mv2,

where m is the mass of the body and v is the velocity with which the body is moving

If velocity v is doubled, the kinetic energy becomes four times as kinetic energy is directly proportional to the square of velocity.

Explanation

Robert Brown discovered Nucleus in: 1831