AQA A2 Biology Unit 4: Populations

what is the difference between biotic and abiotic factors?

name two things that must be considered within an ecosystem

define population

Define community

define habitat

what is an ecosystem made up of?

what is a niche

why is random sampling used

describe the process of random sampling

name three factors to consider when using quadrats

when would systematic sampling be appropriate to use

how would you carry out systematic sampling

define abundance

describe two methods of measuring abundance

when and how is mark release recapture be used

what equation is used to estimate population size using mark release recapture data

describe for the simpsons that must be made when using mark release recapture estimate population size

describe the three general periods Found on a population growth curve

name and explain for a biotic limiting factors

when and why does competition occur

what is intraspecific competition

What is interspecific competition

what is the competitive exclusion principle

what is a predator

how have predators and prey evolved

summarise how are predators prey relationships or cyclic fluctuation in population size

How are population crashes advantageous to organisms?

How has human population size changed over time?

What two basic factors affect population growth?

Distinguish between emigration and immigration

Equation for population growth

Equation for percentage population growth rate

Factors affecting birth rate

Equation for birth rate

Factors affecting death rate

Equation for death rate

Describe the shape of a stable population pyramid, and say what causes it

Describe the shape of, and what causes an increasing population pyramid

What does an decreasing population pyramid look like, and what causes it to occur.

What is average life expectancy?