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 characteristic do all living organisms show?

2017 Summer

3

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows some animal cells, as seen under the microscope. What will be present at X?

2017 Summer

2

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows an animal. What is the animal?1. animal with a vertebral column ........................................ vertebrateanimal with an ex...

2017 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a section through a root.What are the levels of organisation of the labelled structures?[Table_1]

2017 Summer

2

MCQ

CH3 - MOVEMENT IN AND OUT OF CELLS

Which characteristics are correct for both osmosis and diffusion? [Table_1]

2017 Summer

2

MCQ

CH4 - BIOLOGICAL MOLECULES

The table shows the results of some food tests.Which row shows a food containing both protein and starch?[Table_1]

2017 Summer

2

MCQ

CH5 - ENZYMES

The diagrams show an experiment on enzyme activity. The test-tubes contain hydrogen peroxide and the enzyme catalase. In which test-tube is the enzy...

2017 Summer

2

MCQ

CH12 - RESPIRATION

Four test-tubes are set up as shown. Which test-tube contains the most carbon dioxide after one hour?

2017 Summer

2

MCQ

CH6 - PLANT NUTRITION

The diagram shows a cross-section through a leaf.Which tissue is the cell labelled X part of?

2017 Summer

2

MCQ

CH6 - PLANT NUTRITION

In plants, which ions are used to make amino acids?

2017 Summer

2