IB Biology - teaching & learning resources

Topic 5: Ecology and evolution (16 hours)

 

5.1Communities and ecosystems 5 hours

Assessment statement

Obj

Learning Activities

5.1.1

Define species, habitat, population, community, ecosystem and ecology.

1

Intro Powerpoint - to record notes from reading text book activity

5.1.2

Distinguish between autotroph and heterotroph.

2

 

5.1.3

Distinguish between consumers, detritivores and saprotrophs.

2

Colouring in activity in revision booklet.

5.1.4

Describe what is meant by a food chain, giving three examples, each with at least three linkages (four organisms).

2

 

5.1.5

Describe what is meant by a food web.

2

5.1.6

Define trophic level.

1

Feeding Realationships photo quiz

5.1.7

Deduce the trophic level of organisms in a food chain and a food web.

3

Ecosystem introduction videos

5.1.8

Construct a food web containing up to 10 organisms, using appropriate information.

3

Online intro activity

Revision booklet activity: Check that species names are detailed enough.

5.1.9

State that light is the initial energy source for almost all communities.

1

 

5.1.10

Explain the energy flow in a food chain.

3

 

5.1.11

State that energy transformations are never 100% efficient.

1

 

5.1.12

Explain reasons for the shape of pyramids of energy.

3

Questions on page 171 allott.

5.1.13

Explain that energy enters and leaves ecosystems, but nutrients must be recycled.

3

Read Clegg -

5.1.14

State that saprotrophic bacteria and fungi (decomposers) recycle nutrients.

1

Past paper questions on ecological terms

 

5.2The greenhouse effect 3 hours

Assessment statement

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Learning Activities

5.2.1

Draw and label a diagram of the carbon cycle to show the processes involved.

1

Learn to draw diagram of the CARBON CYCLE

Complete worksheet on data - evidence for changes in the Carbon cycle

5.2.2

Analyse the changes in concentration of atmospheric carbon dioxide using historical records.

3

Watch - David Attemborough walks through the data (video)

Mauna Loa, Hawaii,monitoring station (video)

5.2.3

Explain the relationship between rises in concentrations of atmospheric carbon dioxide, methane and oxides of nitrogen and the enhanced greenhouse effect.

 

3

Read the -
Greenhouse effect ppt

Answer these question on greenhouse effect ppt

Human impact Powerpoint

Modelling the Greenhouse effect in conical flasks.

Sample data

Critical consideration of Evidence activity - p181 of Allott.

EU greenhouse effect advert

5.2.4

Outline the precautionary principle.

2

The uncertainty principal. Allott p182, questions 1&3

5.2.5

Evaluate the precautionary principle as a justification for strong action in response to the threats posed by the enhanced greenhouse effect.

3

Evaluation Activity - Polar Bears, Oil & precautionary principal

5.2.6

Outline the consequences of a global temperature rise on arctic ecosystems.

2

Summary past paper questions on greenhouse effect. & answers

Evidence in past paper data questions & answers

Global Warming - Evidence and skeptics evaluation activity

 

5.3Populations 2 hours

Assessment statement

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Learning Activities

5.3.1

Outline how population size is affected by natality, immigration, mortality and emigration.

2

Powerpoint notes...

5.3.2

Draw and label a graph showing a sigmoid (S-shaped) population growth curve.

1

5.3.3

Explain the reasons for the exponential growth phase, the plateau phase and the transitional phase between these two phases.

3

Experiment to model S-shaped growth in a yeast population.

New s-shaped expt. sheet

5.3.4

List three factors that set limits to population increase.

1

 

5.4Evolution 3 hours

Assessment statement

Obj

Learning Activities

5.4.1

Define evolution.

1

Read notes in Evolution powerpoint. & scan through the textbook.

5.4.2

Outline the evidence for evolution provided by the fossil record, selective breeding of domesticated animals and homologous structures.

2

Workbook Section 2.

5.4.3

State that populations tend to produce more offspring than the environment can support.

1

5.4.4

Explain that the consequence of the potential overproduction of offspring is a struggle for survival.

3

Workbook Section 3

5.4.5

State that the members of a species show variation.

1

 

 

5.4.6

Explain how sexual reproduction promotes variation in a species.

3

Workbook Section 4

5.4.7

Explain how natural selection leads to evolution.

3

This is a great animation which explains evolution

This video “how does evolution really work is really good

Students give an explanation of the four steps
– think pair share…

Workbook Question 4

5.4.8

Explain two examples of evolution in response to environmental change; one must be antibiotic resistance in bacteria.

3

Presentation. - of antibiotic resistance

This PBS video shows great details for a study of darwin finches….

Data is in year13 evolution folder on desktop

 

5.5Classification 3 hours

Assessment statement

Obj

Learning Activities

5.5.1

Outline the binomial system of nomenclature.

2

 

5.5.2

List seven levels in the hierarchy of taxa—kingdom, phylum, class, order, family, genus and species—using an example from two different kingdoms for each level.

1

Powerpoint on classification

5.5.3

Distinguish between the following phyla of plants, using simple external recognition features: bryophyta, filicinophyta, coniferophyta and angiospermophyta.

2

Fieldwork at Ax les Thermes

Plant Phyla ID grid

5.5.4

Distinguish between the following phyla of animals, using simple external recognition features: porifera, cnidaria, platyhelminthes, annelida, mollusca and arthropoda.

2

Flowers on the field - Photo identification sheet with key external features.

ANIMAL PHYLA grid

 

5.5.5

Apply and design a key for a group of up to eight organisms.

3

A dichotomous key should be used.

Assessment activity.

Revision Multi-Choice Questions on Whole topic

 

End of topic Test

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