3.4.6/7 Biodiversity within a community, investigating diversity

Question 1

What is biodiversity

Answer 1

The variety of living organisms

Question 2

Define community

Answer 2

All the different species that live in one area and interact with eachother

Question 3

How do you calculate index of diversity

Answer 3

N(N-1) / sum of n(n-1)

N = total number of organisms of all species
n = total number of organisms of each species

Question 4

What impact does farming have on species diversity

Answer 4

Decreases species richness
Use of herbicides/pesticides
Farmland is typically used for only 1 species

Question 5

What impact does farming have on genetic diversity

Answer 5

Decreases
Farmers select for certain characteristics which reduces number of different alleles in population

Question 6

How can biodiversity be increases in areas of agriculture

Answer 6

Use hedgerows instead of fences
Grow different crops in same area
Limit use of pesticides and herbicides

Question 7

Name 4 ways we can compare genetic diversity between organisms

Answer 7

Frequency of observable characteristics
Base sequence of DNA
Base sequence of mRNA
Amino acid sequence

Question 8

What is meant by interspecific and intraspecific variation

Answer 8

Interspecific = differences between individuals of different species
Intraspecific = differences between individuals of same species

Question 9

How can a random sample be achieved

Answer 9

Create grid for your sample area and then randomly generate coordinates where a quadrat or transect can be placed