Many scientific explanations of the origin of life on Earth hold that most early organisms relied on four chemical elements: hydrogen, oxygen, carbon, and nitrogen. Which of these elements most likely increased after the origin of life, allowing more complex organisms to arise and diversify?​

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )

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.