GCSE Biology AQA B1

In this lesson you will be learning to:

List the things needed in a healthy diet.

Describe what these things are needed for.

Explain what the term malnourished means.

Explain how a person may develop illness due to an unbalanced diet.

In this lesson you will be learning to:

State that exercise is good for health.

Describe how exercise increases the metabolic rate.

Explain how other factors affect the metabolic rate.

Explain body mass is lost.

Explain how inherited factors can affect health.

In this lesson you will be learning to:

State that bacteria and viruses are micro-organisms and those that cause disease are called pathogens.

Describe how bacteria and viruses can reproduce and how they can make us ill.

Describe and explain how the body protects itself against pathogens.

Explain how the immune system works.

In this lesson you will be learning to:

State that antibiotics kill bacteria but not viruses.

Describe how Semmelweis improved medical practice.

Explain how the incorrect use of antibiotics is a problem.

Higher

Explain how antibiotic resistance develops and the steps required to deal with it.

In this lesson you will be learning to:

State that vaccines make a person immune to a disease.

Describe how vaccination is carried out.

Explain how vaccines stimulate the body to kill pathogens.

Explain why it is important for people to be vaccinated.

Watch how to get full marks on an exam style question.

You can download a blank version of the question from the supplementary materials.

In this lesson you will be learning to:

State that uncontaminated samples of microorganisms are needed so they can be studied.

Describe the process of producing sterile agar dishes.

Explain how inoculation is carried out.

Explain how safety precautions are taken in schools to avoid growing harmful bacteria.

Explain why higher temperatures can be used in industrial processes.

In this lesson you will be learning to:

State that humans are sensitive to the environment around them.

Describe the different receptors we have and what they are sensitive to.

Describe how receptor cells are like most animal cells.

In this lesson you will be learning to:

List the different types of neurons.

Describe how neurons carry messages to and from the brain.

Explain how a simple reflex occurs.

Describe how an effector organ responds to an impulse.

Explain how a message passes across a synapse.

In this lesson you will be learning to:

State that our internal conditions need to be kept constant.

Explain why the water content, ion content, temperature and blood sugar levels need to be maintained.

Describe the role of hormones in regulating internal conditions.

In this lesson you will be learning to:

State that the menstrual cycle is controlled by hormones.

Describe the menstrual cycle and its effects.

Explain the role of the different hormones in the menstrual cycle.

Explain how hormones can be used to control fertility.

In this lesson you will be learning to:

List the things to which plants are sensitive.

Describe how shoots and roots grow.

Explain how auxin affects growth in the roots and shoots.

Explain how plant hormones can be used to control weeds and to help root growth.

Watch me do an example exam style question.

In this lesson you will be learning to:

State that new drugs are being devised.

Describe how drugs are tested in trials.

Describe examples of useful drugs that improve our lives.

Explain how thalidomide was used and caused terrible problems and how it can be used safely and effectively today.

In this lesson you will be learning to:

State that there are both legal and illegal drugs.

Describe the effects of various drugs.

Explain how and why drugs can cause problems.

Explain how athletes use performance enhancing drugs.

See how to answer an exam question on drugs and hormones.

In this lesson you will be learning to:

State that organisms are adapted to the environment they live in.

Describe some adaptations that plants and animals have.

Explain how particular adaptations enable organisms to survive.

Explain how some adaptations are specially suited to particular environments.

Here is a worked example of an exam question about adaptations for survival.

In this lesson you will be learning to:

List the causes of environmental change.

Describe some effects of environmental change on living organisms.

Explain how living organisms can be used to indicate pollution.

Explain how non-living indicators can be used to measure pollution.

In this lesson you will be learning to:

State that most living things depend on sunlight for energy.

Describe how photosynthesis stores the energy from the sun.

Explain how biomass in a food chain or pyramid reduces at each stage.

Explain why the biomass in a pyramid decreases further up the pyramid.

In this lesson you will be learning to:

State that living organisms take in material from the environment and release these when they die.

Describe how microorganisms cause decay.

Explain how the process of decay releases substances that are needed for growth.

Explain how the substances are continuously recycled in a stable environment.

In this lesson you will be learning to:

State the equations for photosynthesis, respiration and combustion.

Describe how carbon can be trapped and then released in and from organic matter.

Explain how carbon is cycled between organisms.

Watch a worked example exam question on biomass and the carbon cycle.

In this lesson you will be learning to:

State that certain characteristics are inherited from parents.

Describe the role of genes, and where they are found.

Explain how both genes and the environment affect the characteristics of organisms.

In this lesson you will be learning to:

State that genetic engineering involves the transfer of genes from one organism to another.

Describe the process of transferring genes.

Explain why genetic engineering is useful.

Evaluate the issues related to genetic engineering.

Watch me answer a question on genetic engineering.

In this lesson you will be learning to:

State that living things have evolved from simple life forms.

Describe Darwin’s theory of evolution.

Explain why Darwin’s theory was not accepted.

Explain the problems with Lamarck’s theory of evolution.

In this lesson you will be learning to:

State that we sort living things into different groups.

Describe the main groups.

Explain how evolution results from natural selection.

Explain how mutations can increase the rate of evolution.

Watch me answer an exam question about evolution.