Vacuoles can take up to of the space in a plant cell.

30%

80%

50%

10%

i think that c)gold was found there

but i am not sure

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.