Topic/spec points:
4.1 Know that over time the variety of life has become extensive but is now being threatened by human
activity.
4.2 i) Understand the terms biodiversity and endemism.
ii) Know how biodiversity can be measured within a habitat using species richness and within a species
using genetic diversity by calculating the heterozygosity index (H):
iii) Understand how biodiversity can be compared in different habitats using a formula to calculate an index
of diversity (D) - see below:
Questions/Keywords/ Notes / diagrams:
definitions:
What does ‘anthropogenic
factors’ mean with
examples
Define the term “gene
pool” and explain how
biodiversity can be
measured within a
population.
Explain why asexual
reproduction results in
lower biodiversity than
sexual reproduction.
Calculate (H) the
heterozygosity index to
measure biodiversity
within a population.
Explain how biodiversity
can be measured within a
habitat, and use a
calculation to calculate
the index of biodiversity in
a habitat (D). Understand
what the value of D
means, and that it can be
used to compare
biodiversity in different
habitats.
Explain the difference
between “species
richness” and “species
evenness” as a
measurement of
biodiversity in a habitat.
Identify a “dominant
species” in a habitat and
explain its meaning.
Explain why, in terms of
conservation, it is
advantageous for a
population to have a high
level of genetic diversity.
,Define the terms
“endemism” and
“endemic” and identify,
given data, and endemic
species.
Explain why it may be
particularly important to
conserve endemic
species.
Summary:
, Topic/spec points:
4.3 Understand the concept of niche and be able to discuss examples of adaptation of organisms to their
environment (behavioural, physiological and anatomical).
Questions/Keywords/ Notes / diagrams:
definitions:
Define the term
“ecological niche” and
suggest, given
information, what a
particular species’ niche
is.
Define the term
“adaptation” and identify
anatomical, physiological
and behavioural
adaptations
Summary:
4.1 Know that over time the variety of life has become extensive but is now being threatened by human
activity.
4.2 i) Understand the terms biodiversity and endemism.
ii) Know how biodiversity can be measured within a habitat using species richness and within a species
using genetic diversity by calculating the heterozygosity index (H):
iii) Understand how biodiversity can be compared in different habitats using a formula to calculate an index
of diversity (D) - see below:
Questions/Keywords/ Notes / diagrams:
definitions:
What does ‘anthropogenic
factors’ mean with
examples
Define the term “gene
pool” and explain how
biodiversity can be
measured within a
population.
Explain why asexual
reproduction results in
lower biodiversity than
sexual reproduction.
Calculate (H) the
heterozygosity index to
measure biodiversity
within a population.
Explain how biodiversity
can be measured within a
habitat, and use a
calculation to calculate
the index of biodiversity in
a habitat (D). Understand
what the value of D
means, and that it can be
used to compare
biodiversity in different
habitats.
Explain the difference
between “species
richness” and “species
evenness” as a
measurement of
biodiversity in a habitat.
Identify a “dominant
species” in a habitat and
explain its meaning.
Explain why, in terms of
conservation, it is
advantageous for a
population to have a high
level of genetic diversity.
,Define the terms
“endemism” and
“endemic” and identify,
given data, and endemic
species.
Explain why it may be
particularly important to
conserve endemic
species.
Summary:
, Topic/spec points:
4.3 Understand the concept of niche and be able to discuss examples of adaptation of organisms to their
environment (behavioural, physiological and anatomical).
Questions/Keywords/ Notes / diagrams:
definitions:
Define the term
“ecological niche” and
suggest, given
information, what a
particular species’ niche
is.
Define the term
“adaptation” and identify
anatomical, physiological
and behavioural
adaptations
Summary:
