Beings — 5 Biology PYQs with Answers | UKPSC PYQ Hub

Question 1

Fire-fly is a–

Accepted Answer

Insect. Fire-fly is an insect. There are approximately 2,000 firefly species. These insects often live in humid regions of Asia and the Americas, where they mostly feed on plant pollen and nectar. Fireflies are a classic example of an organism that uses bioluminescence for sexual selection.

Question 2

'Termites' are also knows as–

Accepted Answer

White ants. Termites are often referred to as white ants. Termites feed primarily on the cellulose and lignin found in plant cell walls; these compounds are the main ingredients of wood and all paper products. Termites cannot digest the cellulose directly so they rely upon symbiotic bacteria and protozoa living within their intestines to supply most of the enzymes needed for cellulose digestion.

Question 3

Gene is

Accepted Answer

A segment of DNA. A gene is a DNA segment responsible for hereditary information, coding for proteins or regulating cellular functions.

Question 4

Which plant group is commonly known as amphibians of plant kingdom?

Accepted Answer

Bryophytes. Bryophytes are called amphibians of the plant kingdom because they live on land, but depend on water for reproduction. They are found on moist shady hills, old moist walls. Plants of the Bryophyte class help in preventing soil erosion. They have sufficient capacity to absorb water.

Question 5

Who proposed natural system of plant's classification?

Accepted Answer

Bentham and Hooker. Bentham Hooker proposed the natural system of plant classification, detailed in Genera Plantarum. This system emphasizes natural relationships. Linnaeus, Engler, Prantl and Hutchinson also contributed to classification methods.