Honor Bio 2.1

Question 1

What is a population?

Answer 1

A population is a group of individuals of the same species that live in a specific geographic area and can interbreed.

Question 2

What is population density?

Answer 2

Population density refers to the number of individuals per unit area or volume.

Question 3

What is population distribution?

Answer 3

Population distribution describes how individuals are spaced within a habitat, and it can be clumped, uniform, or random.

Question 4

What is clumped distribution?

Answer 4

Clumped distribution occurs when individuals are grouped in patches, often due to resource availability or social behaviors.

Question 5

What is uniform distribution?

Answer 5

Uniform distribution happens when individuals are evenly spaced, often due to territorial behavior or competition for resources.

Question 6

What is random distribution?

Answer 6

Random distribution occurs when individuals are spaced unpredictably, often when resources are abundant and evenly distributed.

Question 7

Why might populations be clumped, uniform, or randomly distributed?

Answer 7

Populations may be clumped due to resource availability or social behaviors, uniform due to territoriality or competition, and random when resources are evenly distributed or there is little interaction among individuals.

Question 8

How do you calculate population density?

Answer 8

Population density = (Number of individuals) ÷ (Area or they occupy)

Question 9

How do you calculate population size using quadrats?

Answer 9

1. Divide the habitat into smaller, equally sized quadrats.
2. Count the number of individuals in randomly selected quadrats.
3. Estimate the population size using the formula:
   (Numberofquadratscounted/Totalnumberofindividualsinquadrats)

Question 10

How do you set up and calculate population size using the mark-and-recapture method?

Answer 10

1. Capture a sample of individuals and mark them.
2. Release them back into the population.
3. Later, recapture another sample and count how many are marked.
4. Estimate population size using the formula:
   (Totalnumberofmarkedindividuals×Totalnumberofindividualsinthesecondcapture/Numberofrecapturedmarkedindividuals)

Question 11

Predict the population distribution of a species that relies on scarce, patchy water sources in a desert.

Answer 11

The population is likely to have a clumped distribution as individuals gather around water sources.

Question 12

Predict the population distribution of a bird species that exhibits strong territorial behavior in a dense forest.

Answer 12

The population is likely to have a uniform distribution due to territorial behaviors that keep individuals spaced apart.

Question 13

100 individuals are captured and marked, 50 are recaptured, and 20 of the recaptured individuals are marked.

Answer 13

100x50/20=250