Plant cells have and which are not present in animal cells.
a. mitochondria, chloroplasts
b. cell membranes, cell walls
c. chloroplasts, nucleus
d. chloroplasts, cell walls

Me the formula cacl2 represents the compound

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer