Populations And Community Dynamics

Question 1

Succession:

Answer 1

The response of communities to change over time.

Question 2

Density dependant:

Answer 2

Linked to the # of organisms in a given space.

Question 3

Organisms are in a state of__________.

Answer 3

Dynamic equilibrium.

Question 4

Primary and secondary succession:

Answer 4

Primary: growing in where no communities exist (no soil either) Ex. Moss.

Secondary: Community already existed.

Question 5

A forest fire is an example of:

Answer 5

Secondary succession.

Question 6

Climax species:

Answer 6

The dominant species in an ecosystem that is STABLE(eq) and is at the end of its succession.

Question 7

FIVE keys to evolution:

Answer 7

1. Overproduction
2. Variation
3. Competition
4. Natural Selection
5. Speciation

Question 8

Gene pool:

Answer 8

Combination of genes and alleles in a population.

Question 9

ALL GENOTYPES IN A POPULATION EQUATION:

Answer 9

P2 + 2pq + q2 = 1

Question 10

ALL ALLELES IN AN POPULATION EQUATION:

Answer 10

P + q = 1

Question 11

Allele frequency vs genotypes frequency:

Answer 11

Allele : DECIMAL

Genotype: PERCENTAGE

Question 12

Genetic drift types:

Answer 12

Founder effect: few individuals start new population elsewhere

Bottle neck effect: survivors of a natural disaster only ones left to produce.

Question 13

Change in population size formula:

Answer 13

B + I - D - E

In open populations

Question 14

R-life strategies vs K

Answer 14

R = bacteria

K = mammals