Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

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

2010 Winter

1

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

A living organism, X, can make its own food, get rid of toxic materials and detect and respond to stimuli.What other four processes must organism X ca...

2012 Summer

1

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which group of organisms has the following features?• three pairs of jointed legs• three-part segmented body• one pair of antennae

2012 Summer

2

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The table shows some characteristics of four different vertebrates.Which vertebrate is a reptile?[Table_1]

2012 Summer

3

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows a fish.Use the key to identify the fish.1. black stripe across the eye ...................................... go to 2no black stripe...

2012 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a student's drawing of guard cells.Which label is not correct?

2012 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a liver cell.Which structure is found in a palisade cell that is not present in this liver cell?

2012 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which diagram shows a plant cell?

2012 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which statement about cells or tissues, is correct?

2012 Summer

1

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Why do some root cells have root hairs?

2012 Summer

1

MCQ

CH3 - MOVEMENT IN AND OUT OF CELLS

Which structures must be present in a cell for osmosis to take place?

2012 Summer

2