Look at the phylogenetic tree below.

which hypothetical organism is the most recent common ancestor for organisms a and g?

a. 4

b. 1

c. 3

d. 2

What is the function of nucleic acids

Why are fossils not found in igneous rocks? igneous rocks are made from cooling of lava or magma. igneous rocks are found too deep underground. igneous rocks are too dark in color to contain fossils. igneous rocks are too dense to contain fossils.

20 the compound al(nh3)2 has atoms of nitrogen.