Question

3. What is the name given to a species that can be used to tell something about the environment (e.g how much pollution there is in water)?

Answer 1

Coliform bacteria

Answer 2

why ?? can u explains that ???

Answer 3

A biological indicator perhaps?

Answer 4

yes @Shadowys

Answer 5

the coliform bacteria are ferment lactose with the production of acid and gas so the polluted water sampel is direct planting on the litmus lactose agar using the concept of production of acid from lactose as a diagnostic feature. And we will also check the BOD of the water.

Answer 6

nice @rahul_rajawat

Answer 7

thanks @gerryliyana