This worksheet and video explore what homeostasis is, the different components, how automatic control systems work, and what negative feedback is.

This worksheet and video cover what meiosis is and it’s different steps.

This worksheet and video cover what osmosis is and where it takes place.

This worksheet covers how exercise affects the body, including how we cope with the extra demand for oxygen, and how the use of anaerobic respiration builds up an oxygen debt.

This worksheet and video cover: why some women are infertile, how hormones can help, how IVF works, and the ethical concerns around such topics. We also do worksheets and videos on lots of other topics, so please check them out on our Tes page and youTube channel!

This worksheet and video cover: how somebody becomes pregnant, the menstrual cycle including the hormones and their effects on the uterus lining, and puberty.

This video covers the structure of the lungs and how the alveoli are adapted for gas exchange

This video explores how temperature and pH affect enzymes, and how to calculate the rate of reaction.

In this video we explore: the conservation of energy principle; the forms energy can take; how energy can be transferred; open and closed systems; and the concept of work done.

This is a video lesson that covers the structure and function of DNA.

This pack contains the following worksheets and answers for the GCSE biology Homeostasis topic: Homeostasis The nervous system & reflex arc The endocrine system Diabetes & controlling blood glucose The menstrual cycle & puberty Contraception Controlling fertility & hormones

This pack contains the following worksheets and answers for the GCSE biology Infection & Response topic: Immune system, physical & chemical barriers Bacterial disease Communicable disease Drug discovery & development Drugs, painkillers and antibiotics Fungal and protist diseases Vaccines Viral diseases

This pack contains the following worksheets and answers for the GCSE biology Organisation topic: Factors affecting enzyme action Digestion Digestive enzymes Gas exchange and the lungs Heart Blood vessels Blood Coronary heart disease Health and disease Risk factors for non-communicable diseases Cancer Plant organisation Transpiration & translocation

This pack contains the following worksheets and answers for the GCSE biology Cells topic: Active transport Diffusion Osmosis Cell organisation (subcellular structures) Enzymes (how they work) Exchange surfaces

This pack contains the following worksheets and answers for the GCSE biology Bioenergetics topic: Respiration Exercise and oxygen debt Photosynthesis Factors affecting the rate of photosynthesis