Topic 3 - Transport In Plants

Question 1

why do unicellular organisms not need transport systems?

Answer 1

substances can diffuse directly into/out of the cell across the cell membrane

Question 2

why do multicellular organisms need transport systems?

Answer 2

direct diffusion would be too slow, substances would have to travel long distances

Question 3

what are xylem tubes?

Answer 3

xylem tubes carry water and mineral salts from the roots up the shoot to the leaves in the transpiration stream

Question 4

what are phloem tubes?

Answer 4

phloem tubes transport sugars and amino acids from the leaves to other parts of the plant

Question 5

what is the movement of food substances around the plant known as?

Answer 5

translocation