An example of sustainable resource use is the use of predators and parasites to
a. eat unwanted plants.
b. pollinate plants.
c. harm natural resources.
d. control pest insects.

As a result of wildfires, in grasslands. a) tree growth increases b) grass growth increases c) soil quality decreases d) invertebrate variety decreases

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere, b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify, d)anaerobic bacteria kept thriving with more oxygen

How can you tell the difference between rough er from smooth er?