Theory

CH18 - VARIATION AND SELECTION

(a) Wheat is a type of grass that has been grown by humans for about 9000 years. The earliest variety is called emmer.Fig. 5.1 shows emmer wheat and a...

2013 Winter

2

Theory

CH18 - VARIATION AND SELECTION

An adaptive feature helps an organism survive in its environment.Adaptive features are inherited.Fig. 5.1 contains diagrams of three animals.(a) For e...

2017 Summer

2

Theory

CH18 - VARIATION AND SELECTION

(a) Polar bears live in and around the Arctic Circle, surviving in extremely cold conditions.Describe and explain one visible adaptive feature that en...

2017 Summer

2

Theory

CH18 - VARIATION AND SELECTION

(a) Sheep are important animals in many parts of the world as they produce meat, wool and milk.Table 10.1 describes some characteristics of five diffe...

2018 Summer

3

Theory

CH18 - VARIATION AND SELECTION

(a) There are two types of cell division, meiosis and mitosis.Cells produced by each type of division have different characteristics and functions.Com...

2017 Summer

2

Theory

CH18 - VARIATION AND SELECTION

(a) The theory of natural selection explains how one species can gradually evolve into a new species.The statements A to F describe six stages in the ...

2017 Summer

1

Theory

CH18 - VARIATION AND SELECTION

(a) Define the term variation............................................................................................................................

2019 Winter

2

Theory

CH18 - VARIATION AND SELECTION

(a) Organisms pass on their genetic information in their gametes.(i) State the name of the type of cell division that produces gametes...................

2018 Summer

2

Theory

CH18 - VARIATION AND SELECTION

Fig. 7.1 is a photograph of a large-scale monoculture of soybeans which are a crop plant.(a) Describe the disadvantages of large-scale monocultures......

2019 Winter

1

Theory

CH18 - VARIATION AND SELECTION

(a) The length of hair in cats is controlled by a single gene.• The allele for short hair is dominant – $H$• The allele for long hair is recessi...

2020 Spring

1

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which organisms carry out respiration, growth, movement and excretion?

2018 Summer

1

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows an animal whose scientific name is *Falco peregrinus*. To which species does it belong?

2018 Summer

5

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

What kind of skin do amphibians have?

2018 Summer

1

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows a flowering plant. Use the key to identify the plant.

2018 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a plant cell. In which labelled part of the cell is sugar made?

2018 Summer

2

MCQ

CH8 - TRANSPORT IN PLANTS

Why do some root cells have root hairs?

2018 Summer

3

MCQ

CH3 - MOVEMENT IN AND OUT OF CELLS

Which words correctly complete the paragraph? Diffusion may be defined as the net movement of particles from a region of their ......1...... concentr...

2018 Summer

2

MCQ

CH3 - MOVEMENT IN AND OUT OF CELLS

Which part of a plant root hair is partially permeable?

2018 Summer

1

MCQ

CH4 - BIOLOGICAL MOLECULES

The table shows the results of food tests carried out on a fruit.[Table_1]What did the fruit contain?

2018 Summer

2

MCQ

CH5 - ENZYMES

An experiment was carried out to investigate the effect of pH on enzyme action. The graph shows the results. What are the labels for the x-axis and th...

2018 Summer

2