Question

Fill in the blanks.
1_____algae fix nitrogen directly from air to enhance fertility of soil.
(b) Milk can be preserved by______
(c) Cholera is caused by________
(d)________ mosquito causes dengue disease in humans.



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Answer 1

Answer:

Explanation:

1. blue green algae

2.pasteurization

3.bacteria

4. Aedes aegypti mosquito.

Answer 2

yes this answer is right.

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