Plants

Question 1

What is biodiversity?

Answer 1

The variety that exists among living things.

Question 2

What is an organism?

Answer 2

A self-contained living thing.

Question 3

What is a habitat?

Answer 3

The place where an organism lives.

Question 4

Give examples of areas of high biodiversity

Answer 4

1. Coral reef
2. Rainforest

Question 5

Give examples of areas of low biodiversity

Answer 5

1. Desert
2. Arctic Tundra

Question 6

State 4 “Threats” to biodiversity.

Answer 6

1. Deforestation
2. Pollution
3. Climate Change
4. Over-exploitation

Question 7

State 4 ways we can improve biodiversity.

Answer 7

1. Reforestation
2. Protect natural habitats
3. Rewilding
4. Promote sustainable land use

Question 8

List the “Sampling techniques” that scientists can use to monitor a population.

Answer 8

1. Quadrats
2. Pitfall traps
3. Camera traps
4. Tree beating

Question 9

Give 2 examples of a “medicinal use” of a plant

Answer 9

1. Willow bark - used to make Asprin
2. Opium poppy - used to make morphine

Question 10

Give 2 examples of a “clothing use” of a plant

Answer 10

1. Cotton - cotton seeds are used to make a wide range of fabrics.
2. Flax - flax fibres are used to make Linen fabric.

Question 11

Give 2 examples of a “construction use” of a plant

Answer 11

1. Pine - used to make ship’s masts
2. Oak - used for structual timber in buildings

Question 12

What is meant by “Photosynthesis” ?

Answer 12

The process used by plants to produce simple sugars (glucose).

Question 13

In which part of a leaf cell does Photosynthesis occur?

Answer 13

The Chloroplasts

Question 14

Which chemical is present within the chloroplasts that is needed for photosynthesis?

Answer 14

Chlorophyll.

Question 15

What are the “Reactants” of Photosynthesis?

Answer 15

Carbon dioxide & water

Question 16

What are the “Products” of Photosynthesis?

Answer 16

Glucose & oxygen

Question 17

What is the source of the energy required for photosynthesis?

Answer 17

The Sun

Question 18

What are the “limiting factors” of Photosynthesis?

Answer 18

1. Light level
2. Carbon dioxide concentration
3. Temperature

Question 19

What is meant by “Starch” ?

Answer 19

A long chain of sugars that a plant uses to store energy.

Question 20

What is the chemical “test” for starch ?

Answer 20

Starch turns iodine from pale brown to blue-black.

Question 21

What are the top 5 main food crops globally?

Answer 21

1. Corn/maize
2. Wheat
3. Rice
4. Potatoes
5. Cassava

Question 22

What are the 4 main causes of hunger globally?

Answer 22

1. Poverty
2. Food shortages/seasonal hunger
3. War & Conflicts
4. Climate change

Question 23

What are the 3 essential nutrients required for plant growth?

Answer 23

1. Nitrogen - used for leaf and stem growth.
2. Phosphorus - used for root growth, flowering and fruiting.
3. Potassium - used for plant health & disease resistance.

Question 24

What is meant by a “Fertiliser” ?

Answer 24

A substance that is applied to a crop to increase its yield by providing essential nutrients.

Question 25

Give 3 examples of natural fertilisers.

Answer 25

1. Animal manure 2. Seaweed 3. Compost

Question 26

What impact can overuse of fertilisers cause?

Answer 26

Highly increased algae growth in streams & rivers can cause the ecosystem to collapse.

Question 27

What is meant by "Genetically modified" ?

Answer 27

An organism that has had changes made to its DNA to make it express a new trait.