Plant Structure B2.3

Question 1

What happens in the leaf?

Answer 1

Photosynthesis, Gas Exchange, water evaporates out.

Question 2

What is the xylem?

Answer 2

Tubes through the stalk of a plant, carry UP water and minerals.

Question 3

What happens at the plants roots?

Answer 3

Water enter through osmosis, mineral ions - Active transport.

Question 4

What happens in the flower of the plant?

Answer 4

Reproduction - where the reproductive organs are.

Question 5

What is the Phloem?

Answer 5

Tubes that carry sugar and other nutrients to where they are needed.

Question 6

Leaf structure can be seen in three sections:
Top
Middle
Bottom
Describe each of these sections and what is included within them.

Answer 6

Top:
Wax cuticle; water proof, prevents water loss
Upper epidermis; Transparent to let light through

Middle:
Palisade cells; Photosynthesis takes place
Spongey Mesophyll (middle) ; gaps that facilitate gas exchange, large surface area.

Bottom:
Stomata; Holes in the lower epidermis, allow gasses in and out
Guard cells; Control what goes in and out - gasses.