Chapter 9 - The Living world

Question 1

What is a population?

Answer 1

A group of individuals of the same species, living in a shared space at the same time.

Question 2

What are the three characteristics used to describe a population?

not the way they are spread out

Answer 2

1. Size: how large?
2. Density: how packed?
3. Distribution: where?

Question 3

What are four factors that affect population size?

Answer 3

1. Births
2. Deaths
3. Immigration
4. Emigration

Question 4

What happens to the size of a population when the births and immigration increase?

Answer 4

Population goes up (increases)

Question 5

What is the equation that determines the number of individuals per one unit of area or volume (population density)?

Answer 5

Total space/area

Question 6

Try this example: In Sarasota Bay, 122 dolphins were found in 100 km^2. Calculate the population density.

Answer 6

1.22 dolphins/per km^2

Question 7

What are the three types of population distribution?

Answer 7

1. Uniform
2. Random
3. Clumped

Question 8

What characteristics belong to a uniform population

Answer 8

Organisms spread out in a fairly regular pattern