Theory

CH11 - GAS EXCHANGE IN HUMANS

In an experiment, three glass bell jars were set up as shown in the diagram.At the end of the experiment, which bell jar has the most oxygen and which...

2009 Summer

Theory

CH11 - GAS EXCHANGE IN HUMANS

The diagram represents the exchange of gases during breathing and during respiration in the body.What is represented by X and by Y?[Table_1]\(\begin{a...

2009 Summer

Theory

CH11 - GAS EXCHANGE IN HUMANS

From the graph, when did the person begin a period of vigorous exercise after resting?

2009 Winter

Theory

CH11 - GAS EXCHANGE IN HUMANS

The diagram shows someone blowing up a balloon. What percentage of the gas in the balloon is carbon dioxide? A 0.04% B 0.4% C 4.0% D 40%

2010 Summer

Theory

CH11 - GAS EXCHANGE IN HUMANS

The diagram shows someone blowing up a balloon. What percentage of the gas in the balloon is carbon dioxide? A 0.04% B 0.4% C 4.0% D 40%

2010 Summer

Theory

CH11 - GAS EXCHANGE IN HUMANS

The diagram shows someone blowing up a balloon. What percentage of the gas in the balloon is carbon dioxide?A 0.04%B 0.4%C 4.0%D 40%

2010 Summer

Theory

CH11 - GAS EXCHANGE IN HUMANS

What are the properties of an efficient gas exchange system, assuming it has a good blood supply? A. large surface and thick walls B. large surface an...

2010 Winter

Theory

CH11 - GAS EXCHANGE IN HUMANS

What are the properties of an efficient gas exchange system, assuming it has a good blood supply?A large surface and thick wallsB large surface and th...

2010 Winter

Theory

CH11 - GAS EXCHANGE IN HUMANS

What are the effects of smoking on the gas exchange system?[Table_1]mucus in the airwayschance of lung infectionAdecreaseddecreasedBdecreasedincreased...

2010 Winter

Theory

CH11 - GAS EXCHANGE IN HUMANS

What are the effects of smoking on the gas exchange system?[Table_1]

2010 Winter

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) (i) State the name of the gas exchange surface in humans. ...........................................................................................

2022 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) Fig. 2.1 is a photomicrograph showing the fertilisation of one human egg cell. [Image_1: Photomicrograph of fertilisation with label 'sperm']Descr...

2022 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) A scientist investigated the effect of temperature on the mass of leaves picked from a tea plant, *Camellia sinensis*.• Three samples of leaves ...

2022 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) Fig. 4.1 is a diagram of Vibrio cholerae, the bacterium that causes cholera. (i) Describe two similarities and two differences between a palisade ...

2022 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The Arabian oryx and the northern white rhinoceros are both mammals.Fig. 5.1 is a photograph of an Arabian oryx. Fig. 5.2 is a photograph of a norther...

2022 Spring

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) Complete Table 6.1 to show the names, functions and sites of action of the three different digestive enzymes.Table 6.1| name of enzyme | function ...

2022 Spring

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

All living organisms release energy from nutrient molecules within their cells. What is the name of this characteristic?

2022 Summer

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which diagram shows a flower from a monocotyledon?

2022 Summer

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a cross-section through two guard cells of a leaf. Which labelled structures would also be found in an animal cell?

2022 Summer

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a cross-section through a leaf. Which label shows a tissue?

2022 Summer