2.1

Question 1

What is population?

Answer 1

group of individuals in a species in the same area at the same time.

Question 2

What is population density?

Answer 2

concentration of a species in an area

Question 3

what is population distribution

Answer 3

a measure of how spread out a population is

Question 4

What is clumped distribution

Answer 4

population clustered in groups

Question 5

What is uniform distribution?

Answer 5

distribution more of less equally spaced apart

Question 6

What is random distribution?

Answer 6

distribution dispersed randomly with no predictable pattern.

Question 7

Why do populations distribute the way they do?

Answer 7

These include local environmental factors, growth characteristics, and behavior (in animals)

Question 8

How do you calculate population density?

Answer 8

total # of individuals/measurement of land area

Question 9

What is direct count to measure population

Answer 9

counting every individual

Question 10

What is indirect count to measure population?

Answer 10

counting every individual in an area and multiplying by the total number of areas

Question 11

How do you calculate random sampling?

Answer 11

of organism in a sample/area of sample = total # (x)/total area

Question 12

How do you calculate mark and recapture?

Answer 12

total marked/total organism(x) =total recaptured with marks/# of captured organisms

Question 13

If there are 2,000 pine trees over an area of 10 square miles, what would the population density be?

Answer 13

200 pine trees/square mile

Question 14

if there are 10 frogs living in a 200-square foot area, how many frogs can you predict would live in a 2000 square foot area.

Answer 14

100 frogs

Question 15

What is the population density per mm if there are 6845 bacteria per 7 mm of blood?

Answer 15

978 (6845/7)

Question 16

Steps for random distribution

Answer 16

1.add all numbers up
2.divide by number of squares that contain numbers
3.multiply by total number of squares

Question 17

When is population distribution clumped?

Answer 17

If resources are only in one area of range/some type of important social network/interaction

Question 18

When is population distribution uniform?

Answer 18

if resources are scarce, strong competition with population and territory.

Question 19

When is population distribution random?

Answer 19

if resources are abundant throughout and there is not strong social interaction

Question 20

random sampling

Answer 20

total population/area of grid=(x) organisms/ total area