Explanation

Pyridine has a lone pair on nitrogen that is not involved in resonance, making it readily available for donation.

In aniline and phenol, lone pairs are delocalized into the aromatic ring, reducing basicity.

Explanation

• The female reproductive part of a flower is called the Pistil.

It consists of three parts:

1. Stigma (receives pollen grains)
2. Style (connects stigma to ovary)
3. Ovary (contains ovules/eggs)

The pistil is also sometimes referred to as the carpel, which is a modified leaf that forms the female reproductive organ.

Explanation

Explanation

Explanation

An electrophile is a species that seeks electrons and can accept an electron pair.

C₂H₅OCH₃ (Ethyl methyl ether) is not an electrophile.

Because it lacks an electron-deficient center and does not readily accept electron pairs.

Explanation

The peptidoglycan cell wall is a unique and defining feature of bacteria.

It provides structural support and protection, helping bacteria maintain their shape.

Peptidoglycan is not found in amoeba, protozoa, or viruses, as these organisms have different structural components.

Explanation

Herbert Spencer (1820–1903) was an English philosopher who initiated a philosophy called 'Social Darwinism'.

He coined the term 'survival of the fittest' seven years before Darwin's publication of his theory of natural history.

The Origin of the Species in 1859.

Explanation

A step-up transformer increases the voltage of the input signal, resulting in a higher voltage output.

This is achieved by having more turns in the secondary coil than in the primary coil.

Explanation

The two unpaired facial bones are the mandible and the vomer.

Mandible:

The mandible, commonly known as the jawbone, is the largest and strongest bone of the face.

It forms the lower jaw and holds the lower teeth in place.

It is the only movable bone of the skull.

Vomer:

The vomer is a thin, flat bone that forms part of the nasal septum, which divides the nasal cavity into left and right sides.

It is located inferiorly within the nasal cavity.