classification

Question 1

Define Biodiversity

Answer 1

has 3 levels
variation in ecosystems or habitats
the number of species and their relative abundance
genetic variation within each species

Question 2

Define species

Answer 2

a group of similar organisms with the same morphological, physiological, biochemical feature

able to interbreed and produce a fertile offspring

Question 3

Define ecosystem

Answer 3

it is a self sustaining unit
self contained/ defines area
community of organisms
many interactions occur between biotic and abiotic factors
all linked but food webs, energy flow in system, nutrient cycling
there is independence between organism and environment

Question 4

Define niche

Answer 4

role of organism or how it fits in an ecosystem
including where it lives
how it obtains its energy

members of the same species occupy same niche
different species alter their use of the niche to avoid competition by dividing resources (Resource partitioning)

Question 5

Pearson’s linear correlation

Answer 5

Between 0 and 1 (Positive correlation)
When one variable changes, the other variable changes in the same direction.
e.g
Baby length & weight:
The longer the baby, the heavier their weight.

0 No correlation
There is no relationship between the variables.

Between 0 and –1 (Negative correlation)
When one variable changes, the other variable changes in the opposite direction.
e.g.
Elevation & air pressure:
The higher the elevation, the lower the air pressure.

Question 7

why spearman’s rank correlation better than pearson’s

Answer 7

The variables are ordinal.
The variables aren’t normally distributed.
The data includes outliers.
The relationship between the variables is non-linear and monotonic.