Biology N Levels Revision (Chpt 7-10)

Which organelle is responsible for photosynthesis?

(a)  

What is the transparent waxy layer found on top of the upper epidermis called?

(a)  

The leaf blade is also known as the ?

• lamina

• petiole

• leaf vein

Do the upper epidermis cells have chloroplasts?

• yes

• no

Which layer of the leaf creates intracellular air spaces?

• upper epidermis layer

• palisade mesophyll layer

• spongy mesophyll layer

• lower epidermis layer

The space between 2 guard cells is known as (a)  

Which of the following statement is true?

• Xylem walls contains cellulose

• Phloem ensures water is transported smoothly to the leaves

• Movement of food around the plant is known as translocation

• There are plenty of cross walls in the xylem

Transpiration refers to the loss of (a)   through the stomata

Which of the following factors does not affect transpiration?

• light intensity

• Carbon dioxide concentration

• humidity

• temperature

High humidity leads to lower rate of transpiration

• True

• False