CB2c-growth in plants

• what are the different stages of growth in plants?

  -cell division

  -elongation

  -differentiation
• what are some specialised plant cells?

  -root hair cells

  -palisade cells

  -xylem cells

  -phloem
• how is a root hair cell adapted to its function?

  -they are covered in tiny hairs which poke into the soil

  -large surface area which helps to absorb more water n minerals
• how is a palisade cell adapted to its function?

  -chloroplasts are towards the tops of leaves for maximum light

  -they have lots of chloroplasts
• how is a xylem adapted to its function?

  xylem cells transport water from the roots up the plant cell into the leaves

  • they lose their end walls so the xylem forms a continuous, hollow tube
  • they are strengthened by a substance called lignin
• how is a phloem cell adapted to its function?

  the phloem moves food substances that the plant has produced by photosynthesis both upwards n downwards

  • sieve tubes: specialised for transport and have no nuclei, each sieve has holes so each membrane is connected
  • companion cells: attached to sieve cells to provide energy