Plant transport pre-work

Which statement regarding the function of xylem is incorrect?

• The xylem transports water

• The xylem moves molecules up and down a plant

• The xylem transports mineral ions

• The xylem forms part of the transpiration stream

Which statement regarding the function of the phloem is incorrect?

• The phloem transports sugars dissolved in water

• The phloem transports amino acids dissolved in water

• The phloem transports molecules up and down a plant

• The phloem is part of the transpiration stream

Which answer correctly identifies A, B and C?

• A = Phloem

  B = Xylem

  C = Vascular bundle

• A = Phloem

  B = Xylem

  C = Stem

• A = Xylem

  B = Phloem

  C = Vascular bundle

• A = Xylem

  B = Phloem

  C = Stem

Leaves minimise the diffusion distance for gases. Which feature of a leaf allows this?

• They have a large surface area

• They have vascular tissue inside

• They are thin

• There are numerous chloroplasts

What is A?

• Waxy cuticle

• Upper epidermis

• Palisade mesophyll

• Guard cell

What is C?

• Palisade mesophyll

• Spongy mesophyll

• Air spaces

• Guard cells

What is J?

• Lower epidermis

• Stomata

• Waxy cuticle

• Guard cell

Answer explanation

Guard cells are part of the lower epidermis but you can identify the guard cell as they contain chloroplasts.

Which of the following are roles of the stomata?

• To absorb carbon dioxide

• Regulate transpiration

• Allow water into the leaf

• To release oxygen

When do guard cells open the stomata?

• When they are turgid

• When they are flaccid

• When they are plasmolysed

• When the solution surrounding them is isotonic

Which response correctly identifies A, B and C?

• A = Cytoplasm

  B = Sieve plate

  C = Companion cell

• A = Sieve plate

  B = Cytoplasm

  C = Companion cell

• A = Sieve plate

  B = Companion cell

  C = Cytoplasm