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Course: Cambridge AS & A Level Biology 9700 ...
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Cambridge AS & A Level Biology 9700 — Revision Notes

1 · Cell Structure

0/26

2 · Biological Molecules

0/51

3 · Enzymes

0/29

4 · Cell Membranes and Transport

0/41

5 · The Mitotic Cell Cycle

0/21

6 · Nucleic Acids and Protein Synthesis

0/22

7 · Transport in Plants

0/28

8 · Transport in Mammals

0/39

9 · Gas Exchange

0/13

10-11 · Infectious Disease and Immunity

0/43

12 · Energy and Respiration

0/37

13 · Photosynthesis

0/23

14-15 · Homeostasis and Control

0/57

16 · Inherited Change

0/34

17-18 · Selection, Evolution, Classification and Conservation

0/69

19 · Genetic Technology

0/44
Quiz

17.1.2 Variation- Discontinuous and Continuous – Exam questions

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  • Questions count: 18
  • Passing grade: B+
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1.
Discontinuous variation is usually caused by:
Genes only
Environment only
Diet
Exercise
2.
Continuous variation is shown on a:
Pedigree
Histogram with a normal distribution
Bar chart with separate groups
Pie chart only
3.
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 1
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 1
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B
C
D
4.
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 3
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 3
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B
C
D
5.
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 4
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 4
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B
C
D
6.
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 5
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 5
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B
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D
7.
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 6
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 6
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B
C
D
8.
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 7
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 7
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B
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9.
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 8
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 8
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10.
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 9
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 9
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D
11.
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 10
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 10
A
B
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D
12.
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 11
IGCSE Biology 18.1 Continuous and discontinuous variation - Question 11
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B
C
D
13.

Continuous variation is typically

controlled by a single gene
controlled by many genes and affected by the environment
shown as distinct categories
unaffected by the environment
14.

Discontinuous variation is shown by

body mass
leaf length
ABO blood groups
height
15.

Phenotypic variation is the result of

genotype only
environment only
mutation only
genotype and environment
16.

Characteristics showing continuous variation produce a distribution that is usually

a bar chart of two classes
a straight line
a normal distribution
random
17.

Polygenes have

small, additive effects on a characteristic
large individual effects
no effect
effects only in males
18.

Environmental variation is

always inherited
caused by mutation
found only in plants
not inherited by offspring
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Part of 17-18 · Selection, Evolution, Classification and Conservation — see every lesson and quiz in this unit.
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