"its only a few drops," you may think as you spill something toxic on the ground. but those drop eventually add up. think about how many drops it would take to make a difference. what do you think would happen if someone spilled 4 l of oil into a lake?

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Ayoung boy has been found and police are trying to locate his family they take a dna sample from him and begin collec dna samples from families who have missing children if police use dna samples only from the fathers, which type of dn technology can they use to identify the boy's parent? y-chromosome analysis omtdna (mitochondrial dna) analysis vntrs (variable tandem repeats) o pcr (polymerase chain reaction) analysis

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.