take a look at “fueling the inventive spirit”. How is Dr. Lonnie Johnson trying to improve batteries?

i think its through the fallopian tube

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.

the answer is d p: cell, q: organ, r: organ system, s: tissue