Explain the three categories of biodiversity. 1.genetic

2.species

3.ecosystem diversity

give examples please

Write a short paragraph of about 150-300 words. explain how the physical environment can limit human activities.

If the distance between two points on the ground is 10 miles and the distance between the same two points on a map is 4 inches, what is the map scale expressed as a ratio?

In which horizon of soil profile is prevent material usually found