2.1 Study Guide

Question 1

Def. of population

Answer 1

all of the organisms in the same place at the same time that can reproduce

Question 2

Def of population density

Answer 2

of individuals per area

Question 3

Def of population distribution

Answer 3

patterns in which organisms of population are spread

Question 4

Random distribution

Answer 4

everywhere, no specific pattern or order

Question 5

Uniform distribution

Answer 5

in arrays, orderly

Question 6

Clumped distribution

Answer 6

close together, in clumps

Question 7

Reasons for Random Distribution

Answer 7

to fall into a favorable environment, to spread quicker and vaster

Question 8

Reasons for Uniform Distribution

Answer 8

invasive species taking over, scarce resources, territorial

Question 9

Reasons for Clumped Distribution

Answer 9

safe environment, safety in numbers, avoids being singled off

Question 10

Each sampled quadrat is 5m x 5m. Five squares were randomly selected, these are the amounts of dandelions in each square:
3, 4, 7, 1, 9
If the field is 625 m2 in area, what is the estimated size of the population?

Answer 10

120 dandelions

Question 11

One night, you trap 40 mice, mark them, and let them go. Two nights later, you again trap 40 mice, and 12 of them are marked. What is the total number of mice in the meadow? (round to nearest whole number)

Answer 11

133

Question 12

If there are 450,000 people in the city of Auburn, and the urban area covers 9 miles, what is the population density/mile

Answer 12

50,000/mile