What is plant cell wall mainly composed of?

• Lipids

• Vitamin

• Cellulose

• Protein

In humans, the sound is produced by the ..........

• oesophagus

• larynx

• medulla

• epiglottis

................ is the process of restoring a forest that once existed but was removed at some point of time in the past.

• Deforestation

• Reforestation

• Greenhouse

• Jhum Cultivation

Nereis, Pheretima (Earthworm) and Hirudinaria (blood sucking leech) are examples of which Phylum?

• Coelenterata

• Aschelminthes

• Annelida

• Arthropoda

Edward Jenner discovered vaccine for which of the following disease?

• Polio

• Tuberculosis

• Small Pox

• Rabies

In how many parts is the human brain divided?

• 2

• 3

• 4

• 5

In which of the following class can we put Adrenaline?

• Hormone

• Enzyme

• Protein

• Fat

Potato, Tomato and Brinjal are three different species but all belong to which genus?

• Solanum

• Panthera

• Felis

• Tigris

The vocal cords in men are about ............ long.

• 10 mm

• 20 mm

• 30 mm

• 40 mm

The first formed primary xylem elements are called ...................

• Metaxylem

• Protoxylem

• Xylem fibres

• Xylem parenchyma