Question

Given below are two statements:
Statement (i): Aedes aegypti contains no anti-coagulant and the blood clots in the stomach within 15 minutes of feeding.
Statement (ii): Aedes aegypti contains an anti-coagulant which prevents the blood clots in the stomach within 15 minutes of feeding.
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (i) and Statement (ii) are correct.
• B. Both Statement (i) and Statement (ii) are incorrect.
• C. Statement (i) is correct but Statement (ii) is incorrect.
• D. Statement (i) is incorrect but Statement (ii) is correct.

Hint:

Mosquito anti-coagulants are medically significant - they are being studied for potential cardiovascular applications.

Answer 1

The Correct Option is D

Aedes aegypti mosquitoes secrete an anti
coagulant in their saliva to prevent blood clotting during feeding
This anti
coagulant allows continuous blood flow for several minutes
Scientific studies confirm the presence of multiple anti
coagulant proteins in Aedes saliva
Therefore:
Statement (i) is incorrect
the mosquito does contain anti
coagulants
Statement (ii) is correct
these prevent clotting during feeding