Paper 1: Biodiversity

Question 1

Biodiversity

Answer 1

The variety of species in an area

Question 2

Population

Answer 2

All organisms of one species in a habitat

Question 3

Community

Answer 3

All of the population of all the species in a habitat

Question 4

Species richness

Answer 4

No. of diff species

Question 5

Index of diversity [explanation]:

Answer 5

describes the relationship btwn no. of species in a community & no. of individuals of each species

Question 6

Index of diversity (d)

Answer 6

∑n x (n-1)

Question 7

index of diversity- N =

Answer 7

Total no. of all species

Question 8

index of diversity-n =

Answer 8

total no. of each organisms in each species

Question 9

index of diversity-∑ =

Answer 9

Sum of

Question 10

What are the effects of farming on biodiversity? [5]:

Answer 10

- Decreases biodiversity (cus forrests cleared & hedgerows removed
= fewer species of plants 
= fewer species of insects (herbicides) 
= fewer food sources 
= fewer habitats & niches

Question 11

Conservation of biodiversity [3]:

Answer 11

• Get farmer to conserve biodiversity
• Protect species by law
• Restrict urban development in biodiverse areas

Question 12

How to investigate diversity [4]:

Answer 12

• Comper diversity within or between species
• comparing DNA sequence
• comparing mRNA sequence
• or amino acid sequence

Question 13

what causes diversity/ variation? [2]:

Answer 13

• Genetic differences (allele combinations)

- Environmental differences (mutations)

Question 14

Sampling [2]:

Answer 14

• Large sample so representative & can do a stats test

- randomly select sample to avoid bias

Question 15

Standard deviation [definition]:

Answer 15

the average variation of data from the mean

Question 16

Standard deviation [2]:

Answer 16

• Lower SD = more reliable

- If overlaps between SD values then difference is not statistically significant