About 99% of the solid Earth is made up of
A.
about half of the known elements.
B.
a small fraction of the known elements.
C.
just one of the known elements.
D.
most of the known elements.
If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly
What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material