Plant Structure and function

This force is exerted as a result of hydrogen bonding between water molecules at an air-water interface. It is responsible for the ability of some organisms to 'walk on water'.

• hydrophobic interaction force

• surface tension

• adhesion

• cohesion

• Vn der Waal's force

This diagram shows a structure found in the lower epidermis of a leaf. What type of cell borders structure D?

• Guard Cells

• Cambium

• Endodermal cells

• Companion cells

• seive elements

Tags

NGSS.HS-LS1-2

What type of cell is described here? Responsible for the transport of assimilates, these cells have very little cytoplasm, no nucleus, and thin cellulose cell walls with perforated end walls between them.

• protoxylem

• xylem

• parenchyma

• seive tube cells

• companion cells

Which cells are described here? In pairs, these form the stomatal pore in the epidermis of plants. They control the opening and closing of the pore by changes in their turgidity brought about by the presence or absence of light.

• parenchyma

• chromatophores

• spongy mesophyl

• gaurd cells

• companion cells

In this diagram of a section through a plant stem, what tissue is labelled E?

• collenchyma

• xylem

• parenchyma

• phloem

• cambium

In this diagram of a root epidermis cell, what feature is labelled A?

• cambium

• cytoplasm

• vacuole

• cell membrane

• cell wall

Tags

NGSS.MS-LS1-2

This diagram shows a structure found in the lower epidermis of a leaf. What does label A correspond to?

• vesicle

• starch grain

• mitochondria

• nucleus

• chloroplast

Tags

NGSS.HS-LS1-5

What term refers to the hydrostatic pressure resulting from the osmotic movement of water?

• water potential

• solute potential

• pressure potential

• cohesion- tension

• surface tension

In this diagram of a plant cell at osmotic equilibrium, what is the pressure potential B inside the cell if the total water potential outside the cellC is -0.5 kPa and the solute potential A inside the cell is -3.0 kPa?

• the system will never reach equilibrium due to haemolysis

• 5.5 KPa

• -2.5 KPa

• -3.5 KPa

• 2.5 KPa

This diagram shows a structure found in the lower epidermis of a leaf. What does label C correspond to?

• thickened cell wall

• companion cell

• region of thinner cell wall

• keratin layer

• cell membrane