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

CH14 - CO-ORDINATION AND RESPONSE

(a) Fig. 1.1 is a diagram showing the position of some organs in the human body. Some of the organs shown in Fig. 1.1 are endocrine glands. Table 1.1...

2021 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) Fig. 2.1 is a diagram of a prokaryotic cell. Fig. 2.1 (i) State one visible feature in Fig. 2.1 that identifies this cell as a prokaryotic cel...

2021 Spring

Theory

CH9 - TRANSPORT IN ANIMALS

(a) The activity of the heart can be monitored using different methods.Fig. 3.1 shows two ECG traces. One trace was recorded when the person was at re...

2021 Spring

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

(a) A leaf can be described as an organ.Define the term organ............................................................................................

2021 Spring

Theory

CH10 - DISEASES AND IMMUNITY

(a) Measles is a transmissible disease.The percentage of the population that were vaccinated against measles in a country was determined.The number of...

2021 Spring

Theory

Food Webs

(a) Fig. 6.1 shows a food web. (i) State the number of trophic levels in the food web in Fig. 6.1. [1] (ii) State the name of one organism that fe...

2021 Spring

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

What is a characteristic of all living organisms?

2021 Summer

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The table shows a section of DNA taken from four different organisms.[Table_1]Which two organisms are the most distantly related to each other?

2021 Summer

MCQ

Animal Kingdom - Arthropods and Vertebrates

Scientists discover a new species of animal. It has a segmented body with two pairs of legs on each segment. To which group of animals does this new s...

2021 Summer

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a single-celled organism called *Euglena*. Which labelled structures would also be found in an animal cell?

2021 Summer