Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

Suggest and explain how humans can cause three undesirable effects on ocean ecosystems.1. ...............................................................

2010 Winter

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

(a) Pollutants can affect the environment.Draw one line from each pollutant listed to an effect it might have on the environment.[Image_1: pollutant a...

2012 Summer

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

Fig. 4.1 shows the water cycle.(a) (i) The arrows labelled $P$ represent evaporation. Which type of energy is needed for this process?...................

2009 Summer

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

Modern technology can be used to increase the yield of crops.(a) The use of chemicals, such as fertilisers, herbicides and pesticides, is one of the d...

2009 Summer

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

(a) Table 5.1 shows data from six countries that have large areas of tropical rainforest.Table 5.1(i) Which country had the largest area of tropical r...

2012 Summer

1

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

(a) Table 5.1 shows data from six countries that have large areas of tropical rainforest.[Table_1](i) Which country had the largest area of tropical r...

2012 Summer

3

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

Explain how the use of chemical fertilisers has increased food production in farming.

2011 Winter

4

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

Fig. 8.1 shows a food web of a community living in a Caribbean ecosystem.(a) (i) Explain the term ecosystem..............................................

2011 Summer

1

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

(a) (i) What happened to the yield of cotton over the three years if no fertiliser was added to the soil?...............................................

2010 Summer

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

Explain how the use of herbicides in farming has resulted in increased food production.

2011 Winter

1

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which characteristic do all living organisms show?

2017 Summer

3

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows some animal cells, as seen under the microscope. What will be present at X?

2017 Summer

3

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows an animal. What is the animal?1. animal with a vertebral column ........................................ vertebrateanimal with an ex...

2017 Summer

9

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a section through a root.What are the levels of organisation of the labelled structures?[Table_1]

2017 Summer

8

MCQ

CH3 - MOVEMENT IN AND OUT OF CELLS

Which characteristics are correct for both osmosis and diffusion? [Table_1]

2017 Summer

2

MCQ

CH4 - BIOLOGICAL MOLECULES

The table shows the results of some food tests.Which row shows a food containing both protein and starch?[Table_1]

2017 Summer

3

MCQ

CH5 - ENZYMES

The diagrams show an experiment on enzyme activity. The test-tubes contain hydrogen peroxide and the enzyme catalase. In which test-tube is the enzy...

2017 Summer

6

MCQ

CH12 - RESPIRATION

Four test-tubes are set up as shown. Which test-tube contains the most carbon dioxide after one hour?

2017 Summer

3

MCQ

CH6 - PLANT NUTRITION

The diagram shows a cross-section through a leaf.Which tissue is the cell labelled X part of?

2017 Summer

2

MCQ

CH6 - PLANT NUTRITION

In plants, which ions are used to make amino acids?

2017 Summer

2