Why are there limited levels of consumers? For example, apex predators are usually tertiary or quaternary consumers. Why don't we have many 5th, 6th, or 7th level consumers?

Heat and pressure can turn all other rocks into __ rock

How does acid preperation affect land and water organisms?

What are some special Features of a cancer cell

The shells of amniotic eggs have pores that allow oxygen and carbon dioxide to pass through. True or false?

Which step in the Gram stain is the critical step in differentiating gram-positive cells from gram-negative cells? A) safranin B) alcohol-acetone C) iodine D) crystal violet

Suppose a bolt of lightning starts a fire in a forest. The fire sweeps through the forest and burns away accumulations of brush and deadwood. What is the most likely effect of the fire on the forest community?

What impact does 2-d diversity have on a company?

How can acid rain affect biodiversity in a pond?

Which of the following would be categorized as a cultural ecosystem service of forests?

Natural selection can lead to formation of a new species which is called?