B4

Question 1

What is a Habitat?

Answer 1

Where a plant or animal lives

Question 2

What is a good BIODIVERSITY?

Answer 2

An area has a large variety of plants and animals

Question 3

How do you measure the distribution of organisms?

Answer 3

Using a TRANSECT LINE

Question 4

How do you use a TRANSECT LINE?

Answer 4

A long length of string is laid across an area. At regular intervals the organisms in a square frame called a QUADRAT can be counted (for animals) or assessed for percentage cover.

Question 5

How can the data from the TRANSECT LINE be shown?

Answer 5

In a KITE DIAGRAM

Question 6

What is an ARTIFICIAL ECOSYSTEM?

Answer 6

Where humans deliberately keep and protect ONLY ONE species (such as salmon in a fish farm) and remove other organisms that would compete with it and lower the yield.

Question 7

What is ZONEATION?

Answer 7

The distribution of organisms.

Question 8

What is the CAPTURE-RECAPTURE method

Answer 8

////////read up on it in revision guide////////

Question 9

How to calculate population size?

Answer 9

number in 1st sample X number in 2nd sample
____________________________________
number in 2nd sample previously marked

////////read up in revision guide////////

Question 10

A word equation for photosynthesis?

Answer 10

6Carbon Dioxide + 6Water = Glucose + 6Oxygen

Question 11

Symbol for GLUCOSE?

Answer 11

C H O

6 12 6

Question 12

In plants what is glucose used for?

Answer 12

Used in RESPIRATION - releasing energy
Converted into CELLULOSE - to make cell walls
Converted into PROTEINS - for growth and repair
Converted into STARCH - fats and oils for storage

Question 13

Why is STARCH used for storage?

Answer 13

It is INSOLUBLE

Question 14

How many stages in PHOTOSYNTHESIS?

Answer 14

It is a TWO stage process

Question 15

What are the two stages in PHOTOSYNTHESIS?

Answer 15

1. Water is split up by light energy releasing Oxygen gas and Hydrogen ions
2. Carbon Dioxide gas combines with the Hydrogen to produce glucose and water

Question 16

What increases the rate of PHOTOSYNTHESIS?

Answer 16

More Carbon Dioxide
More light
Higher temperature for enzyme action

Question 17

Leaves are adapted so PHOTOSYNTHESIS is very…

Answer 17

…EFFIICIENT

Question 18

Leaves are usually broad so they have a large surface area so…

Answer 18

…they can get as much light as possible

Question 19

Leaves are usually thin so…

Answer 19

…gases can DIFFUSE through easily and light can get to all the cells

Question 20

They contain CHLOROPHYLL and other pigments so…

Answer 20

…they can use light from a broad range of the light spectrum

Question 21

They contain specialised guard cells which control the opening and closing of the _______ therefor regulating the flow of Carbon Dioxide and Oxygen as well as water loss

Answer 21

Stomata

Question 22

REVISE THE STRUCTURE OF A LEAF

Answer 22

IN REVISION GUIDE

Question 23

What is DIFFUSION?

Answer 23

The movement of partials in a gas or liquid from an area of high concentration to an area of low concentration.

Question 24

The rate of DIFFUSION can be increased by.

3 points

Answer 24

• a shorter distance for the molecules to travel
• a steeper concentration gradient ( a greater difference in concentration between the two areas)
• a greater surface area for the molecules to DIFFUSE from or into

Question 25

What is OSMOSIS?

Answer 25

The movement of water across a SEMI-PERMEABLE MEMBRANE from an area of high water concentration to an area of low concentration