Algae uses all the energy in sunlight to perform photosynthesis.
true or false

The answer is false. The conversion of sunlight energy into biomass by plants, algae, and other photosynthetic organisms is never 100% efficient. Studies show that only approximately 30% of sunlight captured by chlorophyll. Of this collected sunlight, only 32% is converted to glucose.

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.