The first organisms to appear on Earth did not need? a.
oxygen.
c.
cells.
b.
nitrogen.
d.
chemicals.
PLZ HURRY
I already know that the answer is NOT D.

What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

Iwould appreciate if someone could me.