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

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

The diagram shows the positions of four farms and the concentrations of nitrate at different points in a river.Which farm is likely to have been using...

2009 Summer

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

Untreated sewage can cause pollution of streams and rivers. Some changes in streams and rivers after sewage is added are shown.1. fish die2. the disso...

2009 Summer

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

An agricultural student investigated nutrient cycles on a farm where cattle are kept for milk. The farmer grows grass and clover as food for the cattl...

2009 Summer

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

The levels of carbon dioxide in the Earth's atmosphere have increased during the last one hundred years.What is the most likely cause of this?A cuttin...

2009 Winter

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

The graph shows the relationship between sulfur dioxide pollution and the number of lichen species found on trees.From the graph, which statement is c...

2009 Winter

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

The graph shows the relationship between sulfur dioxide pollution and the number of lichen species found on trees.From the graph, which statement is c...

2009 Winter

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

The levels of carbon dioxide in the Earth's atmosphere have increased during the last one hundred years.What is the most likely cause of this?A cuttin...

2009 Winter

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

What makes nuclear fall-out dangerous to living organisms?A. It causes flooding.B. It causes global warming.C. It damages DNA.D. It damages soils.

2010 Summer

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

A very large area of land has been cleared of rainforest and planted with soybean.What result of deforestation will encourage the growth of the soybea...

2010 Summer

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows a leaf on a plant.Which characteristic of life is represented by this diagram?

2019 Summer

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows how _Homo sapiens_ (modern people) could have evolved from earlier ancestors.Which statement about modern people and their ancestors...

2019 Summer

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The photomicrograph shows part of an animal cell.What is the structure labelled X?

2019 Summer

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which features are possessed by all plant cells? [Table_1]

2019 Summer

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows part of the skin. What is the correct level of organisation for the skin?

2019 Summer

MCQ

CH3 - MOVEMENT IN AND OUT OF CELLS

The diagram shows a test-tube containing clear jelly. A drop of blue ink is injected into the middle of the jelly.The blue colour of the ink spreads t...

2019 Summer

MCQ

CH3 - MOVEMENT IN AND OUT OF CELLS

The apparatus shown was set up. Some hours later, the water in the beaker had turned blue, and the liquid in the glass tube had moved upwards.Which pr...

2019 Summer

MCQ

CH4 - BIOLOGICAL MOLECULES

Four solutions were tested to see whether they contained protein, starch or glucose.The colours of the solutions after the tests are recorded in the t...

2019 Summer

MCQ

CH4 - BIOLOGICAL MOLECULES

Small molecules are used as the basic units in the synthesis of large food molecules. Which statement is correct?

2019 Summer

MCQ

CH5 - ENZYMES

The diagrams show a protease enzyme catalysing the breaking of part of a protein molecule into smaller pieces.Which diagram has three correct labels?

2019 Summer