If a scientist wanted to determine if a forest environment had been polluted, which of the following groups of organisms typically would be the BEST indicator for the presence of pollutants?

fish
birds
mammals
amphibians
insects

Option (4)

Explanation:

Amphibians are those organisms that can dwell in both land and water. They have been present on earth since a long time. These amphibians includes frogs, crocodiles, tortoise and many more. These amphibian species have the ability to exchange various types of gases through their body skin. They can sense the environmental pollution, and have low environmental tolerances. They are good indicators for the presence of various toxic gases or pollutants in an forested environment.

Thus, the correct answer is option (4).

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.