Phylum Arthropoda - Questions & Answers | Exam2Win

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21. Which disease is spread by Housefly

A. Dengue fever

B. Encephalitis

C. Filariasis

D. Gangrene

Explanation:

22. Silk thread is obtained from Silk Moth during

A. Purpal state

B. Larval state

C. Nymph state

D. Adult state

Explanation:

23. In hot summer and cold winter, the number of malaria cases as well as Anopheles declines. Reappearance of malaria in humid warm conditions is due to

A. Surviving malarial parasites in human carriers

B. Surviving sporozoites in surviving mosquitoes

C. Monkeys

D. Mosquito larvae in permanent waters

Explanation:

24. Plant lice are

A. Locusts

B. Ticks and Mites

C. Aphids

D. Plant Bugs

Explanation:

25. Metamorphosis of insects is regulated through hormone

A. Pheromone

B. Thyroxine

C. Ecdysone

D. All the above

Explanation:

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