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

The diagram illustrates some of the processes carried out by living organisms.Which characteristic of living organisms is represented by arrow X?

2015 Summer

1

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

What is a correct way of naming a species, according to the binomial system?

2015 Summer

1

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows four arthropods. How many of these arthropods are insects?

2015 Summer

1

MCQ

CH4 - BIOLOGICAL MOLECULES

The key can be used to distinguish between four different chemical substances. Use the key to identify which substance could be a protein. 1 contain...

2015 Summer

1

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows two guard cells from a leaf. Which labelled part would also be found in liver cells?

2015 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows part of a leaf in cross-section. Structures X and Y are both part of the same

2015 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a plant cell. Which features show that it is a plant cell?

2015 Summer

1

MCQ

CH8 - TRANSPORT IN PLANTS

In a section through a plant, a student found a group of long, microscopic structures. The structures lacked end walls, cytoplasm and nuclei.Which ide...

2015 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a specialised cell cut in half. What does this diagram indicate about the structure of this cell?

2015 Summer

2

MCQ

CH6 - PLANT NUTRITION

How do carbon dioxide and oxygen move in and out of a mesophyll cell?

2015 Summer

2