Answer:
vascular plants have a top and bottom ,a trunk and branches ,leaves or needles the bottom is a system of roots. Xylem and phloem make up transportation system of vascular plants. Xylem is made of vessels that are connected end to end to move water around.
Open and closed circulatory systems are found in animals. blood vessels transport all guilds into a cavity. when the animal moves the blood inside the cavity moves around the body in all directions. most invertebrates like crabs, insects, snails etc...have an open circulatory system.
Answer: is that the ratio get smaller as the cell gets larger. Also the cell grows beyond a certain limit, Not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume.
Explanation:
You repeated the same question twice but the answer is hypothesis.
It’s A an generation that’s the only one that makes sense because evolution is a change over time too
