A resource aimed at advanced biology students, this worksheet contains question requiring students to convert measurements between millimetres, micrometres and nanometres; the final two questions require students to make measurements in order to work out the magnification of a louse and the real size of a red blood cell. This worksheet is ideal as a starter activity to recap a lesson on magnification and units of measurement.

A worksheet aimed at biology students, this resource is designed to practice calculation of percentage changes and designing control experiments for biology investigations. Both skills are often demanded of biology students in examinations and they both tend to be skills that often pose difficulties.

This worksheet is designed to work with the web-based world mapper resource - an ingenious programme that distorts the world map according to the prevalence of certain factors. For example, if cholera deaths was the selected factor, Africa would be hugely increased in size on the map, whereas North America would shrink to become almost invisible. This worksheet allows students to see the impact of various factors of their own choosing on birth rate, death rate and overall population size. A great way for students to find out for themselves how various factors affect the global population. Key words: Population, geography, death rate, birth rate, disease, economics, religion, biology, map, world, earth, continent, countries, europe, north america, south america, asia, oceania

A worksheet of questions related to the nitrogen cycle which students are required to research. Each series of questions is divided into separate categories according to which part of the cycle they relate to: nitrogen fixation, nitrification, ammonification, denitrification, etc. A useful worksheet to issue at the start of a topic as background research for students to gain familiarity with the key ideas. Keywords: Nitrogen, cycle, ammonifiication, denitrification, nitrification, saprobiont, decay, fixation

A summary worksheet for A-Level Biology comprising three exercises, including calculation of population growth, interpretation of survival curves and interpretation of population pyramids (showing increasing, stable and decreasing population). Key words: Population, pyramid, biology, survival, curves, graph, growth, increase, percentage

A resource aimed at advanced biology students, this worksheet provides a comprehensive summary of revision notes on the topic of monohybrid inheritance and Gregor Mendel's classic experiments. The worksheet requires missing words to be entered in the appropriate spaces. Once complete, students have a set of revision notes for their file. The second worksheet provides all the answers, making it possible to set this as a homework exercise that students can then self mark back in class. Key words: Mendel, monohybrid, cross, genetics, inheritance

A resource aimed at advanced biology students, this worksheet focuses on how food is digested in both the mouth and stomach. The worksheet contains both factual information and questions that discuss the breakdown of carbohydrates by salivary amylase and proteins by pepsin. The physiology of the stomach is also covered along with consideration of endopeptidase enzymes. Key words: stomach, mouth, saliva, amylase, maltose, starch, goblet cells, oxyntic cells, hydrochloric acid, endopeptidase, exopeptidase, protein, pepsin

A worksheet aimed at advanced level biology students, this resource provides students with a diagram and explanation of the appearance of a typical sarcomere. Students are required to use this diagram to label an actual micrograph image. The activity is a worthwhile exercise in getting students to relate the actual appearance of striated muscle tissue to the diagrams commonly shown in textbooks. Keywords: sarcomere, myofibril, muscle, z-line, h-zone, a-band, i band, striated

A resource aimed at advanced biology students, this worksheet requires students to identify which stage of mitosis different cell diagrams are in along with key processes associated with mitosis (e.g. chromosomes condense and become visible, nuclear membrane breaks down, etc). The worksheet is useful as either a plenary or starter activity to recap learning following a lesson on this topic Key words: mitosis, chromosomes, prophase, metaphase, anaphase, telophase, interphase, centromere, chromatid

An activity aimed at advanced biology students, this activity provides a series of bullet points related to the nature and mechanisms of hormones, local chemical mediators and the nervous system. Students are required to study the information and then draw their own diagrammatic representations of the information provided in this worksheet. Student diagrams can then be shared with the class, with students providing a commentary as to what each diagram is representing. A good way for students to gain a quick understanding and overview of the ways in which the human body communicates with itself.

A worksheet aimed at advanced biology students, this resource looks provides a sequencing exercise for the events involved in synaptic transmission of an impulse, followed by an exercise that illustrates the complexity of information processing at synapses. Further notes on the nature of temporal and spacial summation are provided. Key words: synapse, cleft, acetylcholine, neurotransmitter, calcium, vesicles, receptors, diffusion, summation, spatial, temporal, processing, synaptic resistance, inhibitory, excitatory

A resource aimed at advanced biology students, this worksheet is a 'DRAW IT' activity - the class is divided into two with each half being required to draw diagrams to represent the information on the sheet. In this case, one half of the students should draw diagrams to represent the action of baroreceptors, the other half should do the same with chemoreceptors. Once complete, students can be paired together to explain their respective diagrams followed by a summative class discussion with the teacher. Key words: baroreceptors, chemoreceptors, reflex, pressure, blood, pH

An activity aimed at advanced level biology students, this resource consists of two worksheets that can be used together or separately. The first worksheet begins with a research task that requires students to make their own notes on key processes involved with meiosis; weblinks and animation references are included and this could be set as a homework the week before the topic commences in class. The second worksheet has a recap of the research learning points before continuing into a long-response question carrying a maximum of ten marks. Students are required to use their initial research to answer the long question: ‘Describe and explain how a diploid cell divides by meiosis to produce genetically variable gametes’ before self marking using the mark scheme provided (sixteen marking points are available). Keywords: meiosis, cell division, gametes, diploid, haploid, biology, crossing over, independent assortment, prophase, anaphase, metaphase, telophase, interphase

A resource aimed at Advanced Level Biology students, this practical schedule provides a fully detailed method by which students can investigate the effect of pH on the rate at which hydrogen peroxide is broken down by catalase. The experiment itself is straightforward to set up and the data gathered from the investigation can be analysed to produce the classic pH versus rate of reaction graph. The schedule includes several exam style questions based on student's understanding of the practical exercise as well as a mark scheme with answers. Key words: catalase, rate, enzyme, pH, buffer, hydrogen peroxide

A worksheet aimed at A-Level Biology students that contains questions on ecological sampling techniques: transects, mark release recapture, random sampling, etc. The resource is useful as a revision exercise once these topics have been taught to students. Key words: Ecology, transect, sampling, quadrat, random, mark, release, recapture, bias, representative

A resource aimed at advanced biology students, these two worksheets bridge the gap between the topics of meiosis and genetics. The first worksheet requires students to recap their knowledge and understanding of meiosis by drawing out the appearance of chromosomes (labelled with genes and alleles) at different stages of cell division. The second worksheet requires students to match definitions to key words (e.g. gene, allelle, homozygous, heterozygous, etc) and identify which characteristics are caused by genetic/environmental factors. Key words: genetics, meiosis, allele, gene, homozygous, heterozygous, gamete, dominant, recessive

A worksheet designed for advanced level biology students that provides a quick quiz of fifteen questions related to the function of different cell organelles. This would be useful as a starter of plenary activity at the end of a topic on cell organelles or could be used as a quick research task using textbooks at the start of the topic. Answers to each question are provided.

A resource aimed at advanced level biology students with each step of the electron transport chain (oxidative phosphorylation) clearly and succinctly described in a series of bullet points. The challenge for students is to use this information to draw their own diagrammatic representations of each process. This resource is best used after a taught lesson on the electron transport chain and a means of recapping each point. Students should have experience in drawing out reaction pathways (e.g. in glycolysis or Kreb's cycle) before they attempt this activity. A shorter DRAW IT activity is included for both the Link reaction and Kreb's cycle as a bonus resource. Key words: electron transport chain, final acceptor, chemiosmosis, hydrogen ions, electrons, carriers, ATP, coupled, ATPase, energy, oxidative phosphorylation

This is a highly engaging activity aimed at 11-16 year olds, but which could easily be adapted for younger children. The activity involves producing a simple microscope from a plastic tumbler, cling film and water. By placing water into a cling film well, students create a lens which refracts light and magnifies objects that can be viewed at the bottom of a plastic tube. Students can alter the shape of the lens and the amount of water to see the impact on magnification. The activity sheets include full instructions (with photographs) on how to set up the microscope and also a table of results for students to fill in details of specimen size, image size and calculate the magnification. For younger students , the second page of the activity sheet provides details of how to set up the microscope; students could then be taken on a nature trail or encouraged to observe small specimens around the room (sweets work well!) Key words: magnification, activity, microscope, specimen, lens, refraction

A worksheet aimed at A-Level students that provides a mix and match task for the different types of nutrition seen across various biological kingdoms. The worksheet includes reference to autotrophs, heterotrophs, photoautotrophs, chemoautotrophs, saprobionts, parasites and holozoic nutrition. The final question requires students to explain why certain examples of living organisms fall into certain categories. Key words: Nutrition, parasite, saprobiont, holozoic, autotroph, heterotroph, photoautotroph, chemoautotroph, algae, tapeworm, human