Evolution is change over time.
Well the main purpose of xylem is to transfer sap from the roots to the leaves and phloem typically transports sugars from leaves to sink tissue. Xylem only travels up from the roots but phloem can have either travel up or down. The outside cells of xylem are dead and the the cells that make up phloem are the sieve elements, which are supported by companion cells.
Answer:
Evolution is not the same as adaptation or natural selection. Natural selection is a mechanism, or cause, of evolution. Adaptations are physical or behavioral traits that make an organism better suited to its environment. Heritable variation comes from random mutations
Evolution is a gradual change in the inherited traits of a population over many generations. Natural selection is a mechanism where the members of a population best suited to their environment have the best chance of surviving to pass on their genes.
D; it best shows the exact definition of probability. Hope this helped!
