Question

(b) How many bacteria live in one gram of soil?
(c) Name the most useful and the most harmful bacteria​

Answer 1

1.billions of bacteria live in one gram of soil because they are too small.

2. there are many examples for useful and harmful bacteria,one of them is

useful: probiotics

harmful:E.coli

Answer 2

Answer:

1.)6,000-5,000 species

2.)most useful=blue-green algae

harmful bacteria---

hepatitus A

Explanation:

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