transport jn plants

Question 1

what is the point of the transport system in plants?

Answer 1

• enables leaves to receive water for photosynthesis

-enables leaves to receive mineral ions needed to convert the products of photosynthesis into useful substances

Question 2

what does xylem transport?

Answer 2

water and mineral ions from roots to leaves

Question 3

what does phloem transport?

Answer 3

-sucrose and amino acids from
the leaves to the growing points (tips of the shoot and flowers)

Question 4

3 facts about the xylem

Answer 4

• made up of thick walled dead cells- completely hollow
  -cell wall contains waterproof lignin
• nitrate ions needed to make amino acids and proteins
  -magnesium ions needed to make chlorophyll

Question 5

3 facts about the phloem

Answer 5

-consists of living cells
-sugar made in photosynthesis converted into sucrose
-moving sucrose and amino acids around the plant requires energy. this is called translocation

Question 6

where do plants take in water from the soil?

Answer 6

-through root hairs- main site of absorption by the roots

Question 7

features of root hairs

Answer 7

-thin walled (short distance)
-hair like extensions greatly increase surface area of root epidermis

Question 8

function of root hairs

Answer 8

-to absorb water and minerals form the soil

Question 9

how do mineral ions get into root hair cells

Answer 9

-active transport

Question 10

water moves ____ a concentration gradient from where there are ____ water molecules to where it here are ____ water molecules. This gradient is maintained as water is continually being taken up by the _____ in the middle of the root. The water is carried in the _____ _______ to all parts of the plant

Answer 10

-Down
-more
-fewer
-xylem
-xylem vessels