Hi i need help. Select all the statements that are true. a
Cells come in different sizes and shapes.

b
All organisms are made of many cells.

c
Some organisms are made of just one cell.

d
All cells are the same size and shape.

e
Most cells are too small to see with the naked eye.

A, C, E

Explanation:

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HOPE YOU GET THIS RIGHT!!!:

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.