Inside a Leaf

Flashcards covering the internal structure of a leaf, the location and requirements of photosynthesis, and gas exchange mechanisms.

Where specifically inside the cells of a leaf does photosynthesis take place?

Inside chloroplasts.

In which part of the leaf are chloroplasts mostly located?

Inside the cells in the middle layers of the leaf.

Why is it easy for sunlight to reach the cells in the middle layers of a leaf?

Because leaves are very thin.

What two substances do chloroplasts need plenty of because they are used in photosynthesis?

Water and carbon dioxide.

How is water transported to the cells in the leaf?

Along the veins.

What are the tiny holes in the leaf that allow gases to diffuse in and out called?

Stomata (singular: stoma).

How does carbon dioxide enter the leaf from the air?

It diffuses into the leaf through tiny holes called stomata.

Through what structure do gases diffuse between the cells inside the leaf?

Through the air spaces between the cells.

Which mineral is required by plants to produce the green pigment chlorophyll?

Magnesium (nitrogen is also needed).

What happens to a plant's leaves if it does not receive enough magnesium?

The leaves turn yellow instead of green.

Why does a lack of magnesium prevent a plant from photosynthesising properly?

Without enough magnesium, the plant lacks chlorophyll to absorb energy from sunlight.

Why do plants need nitrates (nitrogen)?

To convert carbohydrates into proteins for making new cells, and to help make chlorophyll.

What are the effects on a plant if it suffers from nitrogen deficiency?

Its leaves die and the plant remains small or stunted.