Variation

Question 0

What is species diversity?

Answer 0

The number of different species and the abundance of each species within a community.

Question 1

An ecosystem consists of…

Answer 1

All the biotic and abiotic things found in a certain area. The living things form a community.

Question 2

Index of diversity - the higher the number the more diverse the area is

Answer 2

N(N-1)
d=———
€n(n-1)

N=total number of all organisms
n=total number of organisms in one species
€=’sum of’

Question 3

Define interspecific variation

Answer 3

*variation between different species

Question 4

Define intraspecific variation

Answer 4

*differences that occur within a species

Question 5

Genetic factors causing intraspecific variation

Answer 5

• alleles make up its genotype resulting in variations of phenotype
• inherited

Question 6

Environmental factors causing intraspecific variation

Answer 6

• plant growth - amount of minerals in soil
• fur colour - affected by temperature
• identical twins

Question 7

Genetic and environmental factors causing intraspecific variation

Answer 7

• height

* amount of melanin

Question 8

Population samples

Answer 8

*not as time consuming

Question 9

Random sampling

Answer 9

• accurately represents population

* unbiased

Question 10

Mean

Answer 10

• average of the values

* shows variation between samples

Question 11

Bell-shaped graph

Answer 11

• normal distribution curve

* symmetrical about the mean

Question 12

Standard deviation

Answer 12

*spread of values around the mean