Which soil conservation method makes good use of herbicides, pesticides, and minimum tilling?

a)

windbreaks

b)

terracing

c)

conservation tillage

d)

crop rotation

Why are current extinctions of concern to enviromentalists?

Tom wants to conduct a scientific study but he needs to finish by the end of the school year. what practical way could tom work around this limitation and be successful in his study?

The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils