9.1 Study Guide

Question 1

What is the definition of population?

Answer 1

All of the same organisms in the same place at the same time that can reproduce together.

Question 2

What is the definition of population density?

Answer 2

The number of organisms in a given area that can affect the population due to competition for resources, such as predation and spread of disease.

Question 3

What is the definition of population distribution?

Answer 3

Shows the spatial relationship between members of a population within a habitat.

Question 4

Please explain the difference between clumped, uniform, and random.

Answer 4

Clumped: Organisms together in groups.

Random: Can be spread out, but also clumped together.

Uniform: Every individual is spread out.

Question 5

Please explain why you might find a population in the different distribution patterns.

Answer 5

Clumped: For protection, no competition, maybe warmth.

Uniform: Limited resources, territory, competition.

Random: Safety, absence of competition, social/communication.

Question 6

Habitat 1 is split in half with two areas. Together the areas are 2m x 2m. There are 3 individuals in the first half and 4 in the second half. What is the population density?

Answer 6

3/2 = 1.5 km squared.

4/2 = 2 km squared.

Question 7

Please show how to set up and calculate a quadrat problem.

Answer 7

Mean number of individuals per quadrat x area of habitat/area of quadrat. It also depends on the problem, I think.

J 1-10 = 7 flowers x 10 = 70.

Question 8

What distribution do zebras follow? How can you predict population denisty?

Answer 8

Clumped. They stay together in a group, or a herd. Random sampling.

Question 8

How do you set up and calculate a mark and recapture problem?

Answer 8

40 marked/x total = 40 recaptured/20 marked.

40 x 40 = 1600/20 = 80.

Question 9

What is the correct term for the definition: All of the same organisms in the same place at the same time that can reproduce together?

Answer 9

Population.