If a plant has xylem and phloem, then the plant is best described as A.) Nonflowering.
B.) Vascular.
C.) Flowering.
D.) Nonvascular.

If a plant has xylem and phloem , then the plant is best described as " vascular " .

Hope this answer will help you.

i thinking chemical change

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.