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Combined Science: Biology

GCSE · Edexcel · higher

QuestionsFlashcards

Disease
Defence Against Disease
Development of Medicines
- Antibiotics
  4
- Discovery & Development of New Drugs
  6
Non-Communicable Diseases
- Lifestyle & Non-Communicable Disease
  8
- Cardiovascular Disease
  6

The Organism in the Environment
Human Influences on the Environment
- Human Impact on Biodiversity
  6
- Benefits of Maintaining Biodiversity
  6
Cycles within Ecosystems

Variation Flashcards

All 5 cards in this deck

What two things produce genetic variation in a species?: Mutation and sexual reproduction (which gives new combinations of alleles).
What is an acquired characteristic?: A characteristic caused by the organism's environment or lifestyle, not by its alleles.
Give two environmental factors, other than inherited alleles, that influence a person's mass.: Diet / food intake and exercise / activity.
True or false? Acquired characteristics caused by the environment can be passed on to offspring.: False. Only characteristics determined by alleles in the gametes are inherited.
What causes most of the variation in a phenotype?: A mixture of genetic and environmental factors acting together, e.g. skin colour depends on both your alleles and your exposure to sunlight.