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

Theory

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

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

What is a correct way of naming a species, according to the binomial system? A. Homo sapiens B. Homo Sapiens C. human being D. sapiens

2015 Summer

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows four arthropods.[Image_1: Diagram of Pediculus ×20, Anopheles ×10, Dermacentor ×7, Carcinus ×0.5]How many of these arthropods ar...

2015 Summer

Theory

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

Theory

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

Theory

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 sameA. cell.B. organ.C. tissue.D. vessel.

2015 Summer

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a plant cell. Which features show that it is a plant cell?A It has a cell wall and a vacuole.B It has a nucleus and cytoplasm.C It h...

2015 Summer

Theory

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

Theory

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?A The cell has a cell wall.B The ...

2015 Summer

Theory

CH6 - PLANT NUTRITION

How do carbon dioxide and oxygen move in and out of a mesophyll cell?A. active transportB. diffusionC. respirationD. transpiration

2015 Summer