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Topic 4 AQA Biology AS LEVEL Flashcards | StudBud
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Topic 4 AQA Biology AS LEVEL
Topic 4 AQA Biology AS LEVEL
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A AS BIOLOGY quiz on Biodiversity and genetic diversity topics AQA.
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Answers
1
What is a gene pool
all the chromosomes of an organism
all the genes in a population
all the genes of an organism
all the genes of a species
2
Define species
Organisms that can reproduce to produce fertile offspring
Organisms that can reproduce to produce fur offspring
Organisms that can reproduce to produce infertile offspring
Species that can reproduce to produce infertile offspring
3
which of these is a genetic bottle neck?
flood
mass migration
disease
earthquake
4
Is this an example of directional or stabilising selection?
disrupted
Stabalising
Directional
5
Why is index diversity better than species richness to measure biodiversity?
Species richness only measures number of species present
Index diversity has more calculations so more accurate
Species richness counts all individuals in each species
Index diversity is taking into account all species
6
what is phylogeny?
grouping organisms based on DNA
Grouping organisms based on physical traits
Grouping organisms into classes
grouping organisms based on evolutionary relationships
7
What does 'n' stand for in the equation?
Total number of individuals in all species
Total number of organisms for all species
Total number of organisms of each species
Total number of species
8
What happens to the mean and s.d in directional selection?
They both stay the same
Mean changes sd stays the same
Mean increases sd increases
Mean increases sd decreases
9
What is a hybrid?
Two animals joined together
Offspring of the same species
a type of car
offspring of two different species
10
What happens the sd and mean in stabilising selection?
Mean increases sd decreases
Mean changes sd changes
Mean stays the same sd decreases
Mean increases sd stays the same
11
What is species richness?
No. of species in a community
No. of different species in a community
No. of individuals in a community
No. of different animals
12
Is selection that favours average individuals example of directional or stabilising selection.
Directional
Stabilising
13
What is courtship behaviour?
Any behaviour that attracts the opposite sex
Behaviours between males and females that can lead to mating
Male behaviour that leads to mating
Females singing and showing off bright colours
14
How does planting hedges affect biodiversity?
More herbivores
Increases types of plant species
More food sources
Increased number of animals
15
What is genetic diversity
The number of different alleles of genes in a population
The number of different allies in a population
The differences in a population
The variation in a population
16
what is the genus of
Lathyrus odoratus
(sweet pEA)?
Lathyrus odoratus
Plantae
Lathyrus
odoratus
17
What does this formula tell you?
Index of Divergence
Influx of Diversity
Index of Diversity
Index of Biology
18
What does the 'N' stand for in the equation?
Total number of organisms of one species
Total number of all species in a community
Total number of individuals of each species
Total number of organisms of all species
19
what are fungal cell wall made of?
cellulose
chitin
they don't have cell walls
peptidoglycan
20
what is intercropping?
planting crops close together
Growing other plants between crops
planting crops away from each other
allowing weeds to grow
