CB6- Plant structures and their functions

Question 1

What is photosynthesis

Answer 1

Carbon Dioxide+Water=Glucose+Oxygen

A process where plants make their own food by producing glucose and oxygen after taking in carbon dioxide and water. It takes place in the choloroplasts.

Question 2

What is Biomass?

Answer 2

The materials in an organism. Plants and algae produce their own biomass and so produce the food for almost all other life on earth. They are producers in food chains.

Question 3

Formulas for photosynthesis

Answer 3

Carbon Dioxide+Water=Glucose+Oxygen

6CO2+6H20=C6H12O6+6O2

Question 4

Factors that affect photosynthesis

Answer 4

Light intensity, Carbon Dioxide Concentration, Temperature and Cholorphyll concentration

Question 5

Adaptations of a leaf(Potential 6-marker)

Answer 5

-Broad and flat giving them a large surface area
-Palisade Cells near top of leaf are packed with chloroplasts which allow leaf to absorb great deal of light for Psynthesis
-Contain Stomata(Microscopic pores)
-Contain waxy cuticle
Contain Guard cells to control Flow of substances in cell
-Contain xylem and phloem to transport substances

Question 6

Why is photosynthesis in high mountains slower than at sea level?

Answer 6

Reduced concentration of air molecules

Question 7

Adaptations of a root hair cell?

Answer 7

Their structure allows the plant to absorb more water. They also allow a plant to take in the minerals it needs to survive.
Root hair cells have long projections that increase the surface area that the plant can use to absorb water and minerals.
Contain thin cell walls so flow of water is not slowed down

Question 8

Xylem Cell and adaptations

Answer 8

The xylem is specialised to transport water up the stem of a plant and into the leaves.
Adaptations:
-Contain Lignin to strengthen their cell wall
-End wall of dead cells are broken to allow water to move through

Question 9

Diffusion

Answer 9

The movement of particles amongst a concentration gradient(high to low)

Question 10

Osmosis

Answer 10

When solvent molecules(such as water) diffuse through a semi-permeable membrane

Question 10

Osmosis

Answer 10

When solvent molecules(such as water) diffuse through a semi-permeable membrane

Question 11

What is transpiration and affecting factors

Answer 11

The flow of water into a root, up the stem and out of the leaves
Factors that affect:
-Wind 
-Low humidity
-Higher temperatures

Question 12

What is translocation

Answer 12

The flow of sugar(sucrose) through a plant

Process: Sucrose is translocated(transported) in the sieve tubes of the phloem. The sucrose solution flows through connected sieve cells.