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

2

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

2

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

2

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

1

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

3

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

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

2021 Spring

2

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

2

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

2

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

What is a characteristic of all living organisms?

2021 Summer

2

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

2

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

2

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

1