Three of the following components belong to one group,while one component is different from the group. Which component is the odd one out?

Mention the differences between food habits of organisms belonging to the first and third trophic level. Give one example of each of them.

Which of the following is included in edaphic factors?

$15 \%$ can be taken as the average value for the amount of organic matter that is present at each step and reaches the next level of consumers.

Non-biodegradable materials do not break down by the action of microorganisms. Will there be any effect of heat and pressure if they remain buried under the land for a long time?

Give two differences between food chain and food web.