Which element found in both biotite mica and muscovite mica, makes up the greatest percent by volume of earths crust.

Two closely related species of frogs live by the same pond. Species A feeds on flies and caterpillars, while species B feeds on grasshoppers and worms. Explain how the two species coexist?

Identify the two main regions of a typical mollusk's body

How do people snorkle underwater without oxygen tank?

How does a bacterial cell protect its own dna from restriction enzymes?

Write a paragraph describing how Earth would be different if photosynthetic plants had not evolved.

Is oil or biomass abundant

Which region of a tRNA molecule binds to amino acids? a. Anticodon loop b. Codon loop c. The 3' end d. Variable loop

Enzymes are made of protein and a non protein therefore they can not be denatured? True or false?

Who was the first person to attempt to classify the living organisms on earth?

Samples as small as a few skin cells can potentially contain DNA. T/F