Biology - Study Mode

[#321] Virus range in size from
Correct Answer

(D) 2 nm to 300 nm

Explanation

Solution: A virus is an infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria. They range in size from about 20 to 300 nanometres in diameter.

[#322] Virus was discovered by
Correct Answer

(C) D. Iwanowski

Explanation

Solution: Two scientists contributed to the discovery of the first virus, Tobacco mosaic virus. Ivanoski reported in 1892 that extracts from infected leaves were still infectious after filtration through a Chamberland filter-candle.

[#323] The study of microorganisms is termed as
Correct Answer

(B) Microbiology

Explanation

Solution: Technically a microorganism or microbe is an organism that is microscopic. The study of microorganisms is called microbiology.

[#324] Entamoeba Histolytica is a
Correct Answer

(B) Protozoan

Explanation

Solution: Entamoeba histolytica is a protozoan parasite that accounts for an estimated 100,000 annual deaths globally.

[#325] Amoeba belongs to which group
Correct Answer

(A) Protozoa

Explanation

Solution: Amoeba belongs to which group protozoa.