Biology — Life Processes

Fertilisation, sex inheritance and fetal developmentSign up

Describe the fusion of gametes to produce a fertilised egg with a new combination of DNA. · Describe the inheritance of sex in humans in terms of XX and XY chromosomes. · Discuss how fetal development is affected by the health of the mother, including the effect of diet, smoking and drugs.

Variation and natural selectionSign up

Describe variation within a species and relate this to genetic differences between individuals. · Describe the scientific theory of natural selection and how it relates to genetic changes over time.

PhotosynthesisSign up

Know that plants require minerals to maintain healthy growth and life processes (limited to magnesium to make chlorophyll and nitrates to make protein). · Know that photosynthesis occurs in chloroplasts and is the process by which plants make carbohydrates, using the energy from light. · Know and use the summary word equation for photosynthesis (carbon dioxide + water -> glucose + oxygen, in the presence of light and chlorophyll).