Variation

Question 1

Interspecific and intraspecific variation

Answer 1

Inter : between 2 species
Intra : between members of a specie

Question 2

Why can sampling be non representative

Answer 2

Sampling bias
Chance

Question 3

How to prevent bias

Answer 3

Carry out sampling at random
Use random numbers from table or generated by computer
Take sample at the intersection of each pair of coordinates

Question 4

How to prevent chance

Answer 4

Use larger sample size
Analyze data collected using statistical tests

Question 5

Genetic Causes of variation

Answer 5

Asexual : only mutations
Mutations : Production of new forms of alleles
Meiosis : independent assortment of chromosomes and crossing over
Random fusion of gametes

Question 6

Environmental causes of variation

Answer 6

Climatic conditions
Food
pH
Soil conditions

Question 7

Continuous variation

Answer 7

Charcatertic that changes gradually over a range of values

Question 8

Discontinuous variation

Answer 8

Characteristic with limited number of possible values

Question 9

The mean

Answer 9

Measurement at maximum height of curve
Doesn’t provide info about range of values

Question 10

Standard deviation

Answer 10

Measure of width of curve and provides information about range of values on either side of mean

Question 11

Biodiversity

Answer 11

Number of diff alleles of each gene