Cell theory states: l. All living cells must have a cell wall.
ll. All living cells require glucose for survival
lll. A cell is the basic unit of life.

A. l only
B. ll only
C. lll only
D. l and lll​

C

Explanation:

cell theory states:

all living things are made of 1 or more cells

all cells come from pre-existing cells

the cell is the basic unit of structure

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.