True or False

Question 1

True or False:
Speciation can occur
without geographical
isolation.

Answer 1

True
Explanation: This is called
sympatric speciation, where
reproductive isolation occurs
within the same environment.

Question 2

True or False: Genetic
drift has a greater
effect in large
populations.

Answer 2

False
Explanation: Genetic drift has a
greater effect in small
populations, where random
changes in allele frequency are
more significant.

Question 3

True or False: The Hardy-
Weinberg principle
assumes that mutation
and selection are
occurring.

Answer 3

False
Explanation: It assumes no
mutation, selection, migration,
or genetic drift, and random
mating.

Question 4

True or False:
Directional selection
favours individuals with
extreme phenotypes.

Answer 4

True
Explanation: Directional selection
shifts the population towards one
extreme phenotype that gives a
selective advantage.

Question 5

True or False:
Succession leads to
decreased biodiversity
over time.

Answer 5

False
Explanation: Biodiversity
increases as new species
colonise and the environment
becomes less hostile.

Question 6

True or False: In
stabilising selection,
extreme phenotypes
are favoured.

Answer 6

False
Explanation: Stabilising
selection favours the mean
phenotype, reducing the range
of variation.

Question 7

True or False: A climax
community is the final,
stable stage of
succession.

Answer 7

True
Explanation: The climax
community is in equilibrium
with the environment and
remains stable unless
disrupted.

Question 8

True or False: The mark-
release-recapture
method can be used for
both plants and
animals.

Answer 8

False
Explanation: It is used for
motile animals. Plants are
sampled using quadrats and
transects.