REPRODUCTION (either sexual or asexual) is found in all unicellular organisms.
Those would be enzymes I believe. They are the power house of the membrane and lower the amount of activation energy needed.
Xylem is one of the two types of transport tissue in vascular plants, phloem being the other. The basic function of xylem is to transport water from roots to stems and leaves, but it also transports nutrients.
B. Using fewer fossil fuels, such as gasoline for a car, reduces the emission of harmful pollutants into the air
