Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

A student measured the uptake and release of carbon dioxide from a plant during 24 hours. It was a very bright, sunny day between sunrise and sunset.F...

2010 Summer

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

(a) (i) State one cause of acid rain other than that shown in Fig. 4.1...................................................................................

2010 Summer

1

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

(a) Define the term population...........................................................................................................................

2011 Winter

1

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

(a) (i) State two types of natural disaster that occur suddenly and may lead to severe food shortages.1..................................................

2010 Summer

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

There is evidence that the concentration of carbon dioxide in the Earth's atmosphere is increasing.Which change could explain this?A. less combustion ...

2012 Winter

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

Which human activity can cause eutrophication of lakes? A. releasing carbon dioxide B. releasing sulfur dioxide C. using fertilisers D. using pesticid...

2012 Winter

1

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

Insecticides sprayed in low concentrations may increase the yield of a crop, but may also be harmful to wildlife. What is an explanation for this?A In...

2012 Winter

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

What effect does deforestation have on the levels of carbon dioxide, oxygen and water vapour in the atmosphere?[Table_1]carbon dioxideoxygenwater vapo...

2010 Winter

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

A persistent pesticide is one that does not break down.What is one disadvantage of a persistent pesticide?A. It becomes more concentrated at each leve...

2010 Winter

1

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

What could be a consequence of deforestation?A. More habitats are produced for animals and plants.B. More transpiration may increase rainfall.C. Rainw...

2009 Summer

1

Theory

CH11 - GAS EXCHANGE IN HUMANS

(a) Fig. 1.1 is a diagram of the human gas exchange system. (i) Identify the structures labelled A, B and C in Fig. 1.1.A ...............................

2020 Spring

1

Theory

CH9 - TRANSPORT IN ANIMALS

(a) Fig. 2.1 shows the transfer of materials between blood and tissues.(i) Complete Table 2.1 by:• stating the names of the fluids• writing yes if...

2020 Spring

1

Theory

Role of Adrenaline

(a) One of the characteristics of living organisms is sensitivity. Define the term sensitivity. (2) (b) State the names of two sense organs. (1) (c...

2020 Spring

1

Theory

CH7 - HUMAN NUTRITION

(a) Describe the similarities and differences between marasmus and kwashiorkor.similarities .............................................................

2020 Spring

1

Theory

CH16 - REPRODUCTION

(a) Mitosis is a type of nuclear division.Fig. 5.1 is a series of photomicrographs showing a cell dividing by mitosis.(i) State the change that has oc...

2020 Spring

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

(a) Atlantic cod, Gadus morhua, is a type of fish that is an important resource for commercial fishing.Fig. 6.1 shows the estimated mass of Atlantic c...

2020 Spring

1

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows what happened in an experiment with plant seedlings. Which characteristic of living things made the seedlings grow towards the lig...

2020 Summer

2

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

A rat has the scientific name $Rattus$ $rattus$.What do the two parts of this name refer to?

2020 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows two guard cells.Which label shows the cell wall?

2020 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagrams show different levels of organisation in a plant. Which sequence shows the levels of organisation in order from smallest to largest?

2020 Summer

1