Plant Tissues

Question 1

What are the thin cells at the top and bottom of the leave called?

Answer 1

• Epidermal cells.
• Form epidermal tissues.
• Protects surface of the leaf

Question 2

What are the features of the upper epidermis cell?

Answer 2

• Upper epidermis is transparent.
• Allows light to pass through to the photosynthetic cells bellow.
• Thin Layer of oily material= Waxy cuticle.#
• Reduces evaporation of water from the surface of the leave.
• Prevents leave from drying out.

Question 3

What are the features of the lower epidermal cells?

Answer 3

• Tiny pores called stomata.
• Allows co2 to enter the leaf.
• O2 to leave.
• Helps control amount of water vapour that can pass out the leaf.

Question 4

What are guard cells?

Answer 4

• .

Question 5

What is the palisade mesophyll?

Answer 5

• Consist of palisade cells.
• Packed with chloroplasts.
• Contains chlorophyll which absorbs the light energy needed for photosynthesis.

Question 6

What is the spongy mesophyll?

Answer 6

• Full of air spaces.
• Air spaces= Allows co2 to diffuse from the stomata through the spongy mesophyll to the palisade cells.
• Oxygen also diffuses from the palisade cells through spongy mesophyll to the stomata.

Question 7

What do xylem tissues do?

Answer 7

• Transport water and dissolved minerals from the roots to the stems of the leaves
• Some water is then used in photosynthesis.
• Dissolved Minerals= Include mg used to make chlorophyll.

Question 8

What do phloem cells do?

Answer 8

• Transports dissolved sugars,
• Produced by photosynthesis.
• From the leaves to rest of the plant.
• Sugars can be used immediatley.
• Sugars can be stored.

Question 9

What is the movement of sugars and other molecules called?

Answer 9

• Translocation.