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2401. The study of the relation of animals and plants to their surroundings is called

A. Ecology

B. Ethnology

C. Genealogy

D. Iconology

Explanation:

2402. Cells plate formation during karyokinesis (Division of nucleus) takes place due to the action of

A. lysosomes and mesosomes

B. mesosomes and mitochondria

C. golgi bodies and endoplasmic reticulum

D. lysosomes and endoplasmic reticulum

Explanation:

2403. Which of the following helps in intracellular digestion ?

A. Golgi apparatus

B. Endoplamic reticulum

C. Lysosomes

D. Plasma membrane

Explanation:

2404. The main factor which determines the balance of nature is

A. human activities

B. habit and habital

C. environmental conditions

D. availability of food

Explanation:

2405. What is laughing gas

A. Carbon dioxide

B. Sulphur dioxide

C. Hydrogen peroxide

D. Nitrous oxide

Explanation:

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