Plant cells

Question 1

Adaptations of a root hair cell

Answer 1

Lots of mitochondria to actively respire for active transport, large surface area to absorb more water and nitrates

Question 2

Xylem

Answer 2

Transports water and minerals from the roots to the leaves.
Consists of dead cells, with no end walls so the xylem forms a continuous and hollow tube, they are strengthened by a substance called lignin.
Transport in the xylem is a physical process. It does not require energy.

Question 3

Phloem

Answer 3

Moves food substances that the plant has produced by photosynthesis. Made of:
Sieve tubes - have no nuclei. Each sieve tube has small holes at the end so its cytoplasm connects one cell to the next.
Companion cells - transport of substances in the phloem requires energy. One or more companion cells attached to each sieve tube provide this energy through respiration. A sieve tube is completely dependent on its companion cells.

Question 4

What tissues are in plant veins?

Answer 4

Xylem and phloem