Question

define lithosphere ,food web and tropic levels​

Answer 1

Answer:

1. Define lithosphere

Lithosphere is the solid part that forms the outermost shell of the earth. It is made up of rocks and thin layers of soil that sustain organisms. There are high mountain ranges, plains and plateaus and deep valleys that form the ocean floor.

2. Define food web

A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community. Another name for food web is consumer-resource system.

3. Define tropic level

The tropic level of an organism is the position it occupies in a food web. A food chain is a succession of organisms that eat other organisms and may, in turn, be eaten themselves. The tropic level of an organism is the number of steps it is from the start of the chain.