B3

Question 1

What are enzymes?

Answer 1

Catalysts that are produced by living things, has an optimum temperature in which they work best in but if it gets to hot then the enzyme denatures

Question 2

What are the three things that affect the rate of reaction?

Answer 2

1.Temperature
2.Concentration
3. pH

Question 3

What is photosynthesis?

Answer 3

• The process of making glucose using water sunlight and carbon dioxide in producers to feed itsself
• It can be affected by: co2 concentration, light intensity and temperature

Question 4

What is the equation for photosynthesis?

Answer 4

Carbon dioxide + water ========> glucose + oxygen
6CO2 + 6H2O =>LIGHT AND CHLOROPHYLL==>C6H1206+602

Question 5

Where does photosynthesis take place?

Answer 5

In the chloroplasts. Endothermic reaction.

Question 6

What happens in the light dependant stage of photosynthesis?

Answer 6

Water molecules split into hydrogen and oxygen(released into air)

Question 7

What happens in the light independant stage of photosythesis?

Answer 7

CO2 from the air chemically combines with hydrogen to make glucose.

Question 8

What is diffusion?

Answer 8

The movement of particles from an area of high concentration to low concentration.

Question 9

What is osmosis?

Answer 9

The movement of water particles from an area of high concentration to low concentration

Question 10

What is active transport?

Answer 10

The movement of particles from an area of low concentration to high using energy transferred during respiration

Question 11

What is Phloem?

Answer 11

Transports food substances. Sieve tube elements, no nucleus, has a companion cell. MOVEMENT OF FOOD SUBSTANCES IS REFFERED TO AS TRANSLOCATION.
Sugars enter through active transport, then is pushed around by water , which enters the phloem by osmosis.

Question 12

What is stomata?

Answer 12

Allows for CO2 and oxygen to diffuse out of a leaf.

Question 13

What is transpiration

Answer 13

Loss of water in a plant.

Question 14

What are the different stages of a food chain and how does each work in terms of energy?

Answer 14

Producers, primary consumers, secondary and tertiary
The pyramids of bio mass work in the way the producers recieve the most energy and the tertiary recieves the least

Question 15

What is decomposition?

Answer 15

When microorganisms help in the recycling of materials.
It contributes to global warming.

Question 16

What is bioaccumulation?

Answer 16

The increase over time of a substance in a food change

Question 17

What is random sampling?

Answer 17

Using a quadrat involves the placing of quadrats at random coordinates

Question 18

What is symbiosis?

Answer 18

Interaction between two organisms in a mutually beneficial way

Question 19

What is the xylem used for?

Answer 19

Transports wataer and minerals upwards from roots

Question 20

What is transpiration?

Answer 20

Evaporation of water from the aerial parts of a plant

Question 21

What is translocation?

Answer 21

the transporting of sugars around the body

Question 22

What are abiotic factors and biotic factors?

Answer 22

• Abiotic factors- Non livinf parts of the environment that can affect organsims
• Biotic factors-Any living factor that affects another organism or shapes the ecostem in some wayqqq

Question 23

What is eutrophication?

Answer 23

The process by which a body of water becomes enriched with nutrients, leading to excessive growth of algae and other aquatic plants