Y9 LC2 Homework 2

A collection of specialised cells that come together to perform a function is a(n) ______________.

• Cell

• Tissue

• Organ

• Organ system

A collection of tissues that come together to perform a function is a(n) ______________.

• Cell

• Tissue

• Organ

• Organ system

Which two layers of the leaf make up mesophyll?

• 1 and 3

• 4 and 5

• 7 and 6

• 2 and 4

Which number is labelling the stomata?

• 2

• 3

• 6

• 7

Which layer is transparent and waterproof?

• 1

• 2

• 3

• 4

___________________ is a tightly packed layer of cells that provides protection for the leaf.

• Waxy cuticle

• Upper epidermis

• Palisade mesophyll

• Spongy mesophyll

___________________ is a layer that contains many chloroplasts and has a large surface area to absorb sunlight for photosynthesis

• Waxy cuticle

• Upper epidermis

• Palisade mesophyll

• Spongy mesophyll

___________________ is a layer of the leaf that has a large surface area and lots of air spaces for gas exchange

• Waxy cuticle

• Upper epidermis

• Palisade mesophyll

• Spongy mesophyll

___________________ is a transparent , waterproof layer at the top of the cells that allows sunlight to pass through and prevents water loss.

• Waxy cuticle

• Upper epidermis

• Palisade mesophyll

• Spongy mesophyll

Stomata are pores on the underside of the leaf that are opened/closed by _____________ cells.