This lesson covers the environmental factors can act as stabilising, disruptive and directional forces of natural selection and how selection, the founder effect, genetic drift and the bottleneck effect may affect allele frequencies in populations.

This lesson covers how bacteria become resistant to antibiotics as an example of natural selection.

These two PPT’s cover all glands and the hormones they produce. They can be used for all exam boards and their specifications. Both PPT’s contain many visuals and cover the consequences of the deficiency of certain hormones on the body. The PPT’s also cover the differences between exocrine and endocrine glands, including the 2nd messenger model for for cell signalling.

This lesson starts be recalling differences between hormonal and nervous control then revisits KS4 learning on the neurone and the CNS. Sensory, relay and motor neurones are covered, including the finer ultrastructures. All resources included.

First lesson for CIE iGCSE Biology on characteristics and classification of living organisms. The PPT gives examples of each of the seven characteristics along with a task sheet to give examples of the characteristics in both plants and animals. A summary crossword task for the plenary.

This lesson moves on to revisit the learning from the previous lesson on using a microscope to view onion and cheek cells. Students are introduced to a series of items that have been magnified and they are asked to identify each one. Students are then showed an animation from CellsAlive to rank magnified specimens in order of size. The lesson concludes with an introduction to the magnification formula, micrometers and unit conversions, together with some magnification calculations using unit conversion. Also included is a CIE specific assessment with the mark scheme.

This lesson revisits KS4 learning of synapses and moves on to the stages involved in the passages of neutrtransmitters across the cleft. Also covered is unidirection, summation and inhibition, followed by the neuromuscular junction and a comparison between both the cholinergic synapses and neuromuscular junctions. The lesson also includes details on how drugs affect neurotransmission (not required for CIE). Lots of visuals and videos to embed learning. Details of the T-tutbule system and sacoplasmic reticulum and included in the next lesson on muscle contraction. Exam questions also included.

This lesson looks at the mode of action of the Venus Fly Trap and how it responds to stimuli. the lesson then progresses into the roles of hormones gibberellins and auxin. Lots of visual diagrams to illustrate concepts. Biofactsheets on plant hormones and CIE specific exam questions and mark scheme provided.

This lesson starts with recall of how resting potential is maintained and the functions of the sodium potassium pump and voltage gated channels. The lesson then progresses into the the generation of an AP and the all or nothing response. Repolarisation and hyperpolarisation is covered. PPT is visual and includes videos to embed concepts. All resources are included in the PPT.

In this lesson, students learn about the stages of the menstrual cycle and the changes in the uterus and ovaries during the menstrual cycle. For higher tier students, they also learn of the role of hormones FSH, LH, progesterone and oestrogen in controlling the menstrual cycle. Lots of resources, activities and exam questions.

This lesson provides students with the opportunity to analyse the relationship two variables and how biotic and abiotic factors affect distribution and abundance of species. Fill worked examples of Pearson’s Linear Correlation included.

This lesson covers how proteins are made, including the role of RNA polymerase, messenger RNA, transfer RNA, ribosomes and the role of start and stop codons. The lesson progresses into the roles of the DNA template (antisense) strand in transcription, codons on messenger RNA and anticodons on transfer RNA. Fully resourced with video’s and practise exam questions.

This lesson starts with a recall KS4 chromosome structure. The lesson then progresses into the structure and functions of: DNA; Histones; Chromatids; Centromeres, and Telomeres.

This lesson starts with a review of different classes of drugs and thenwhat antibiotics are used for. The lesson then explains how they work with an analysis of how antibiotic resistance can occur and how we can stop the spread of antibiotic resistance. Fully resources with videos and exam questions.

This lesson starts by revisiting previous learning on APT with exam questions on ATP reactions and the it’s role as the universal energy currency. The first learning episode is recalling the 3 macromolecules and linking their structures to how much energy they carry. Respiratory quotients is covered including how to calculate, concluding with a YouTube video on how to use a respirometer.

This lesson starts with KS4 recall of plant cell organelles which then links into the structure of the chloroplast. There are a lot of magnified diagrams to illustrate structure. The lesson concludes by explaining structure to function using text from a Biofact sheet and answering questions. All resources included including additional Biofact sheets on comparisons between mitochondria and chloroplasts.