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

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 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 biology, applied science or physical education students, this worksheet provides several questions that lead students through the topic of blood doping. Lance Armstrong is used as a contextual example of an athlete that has been disgraced following the revelation that he was involved in blood doping; the worksheet provides questions on the effect of EPO, the impact on blood cell counts and how haematocrit tests could be used to provide evidence. The worksheet also has follow up questions on the use of steroids and diuretics in sports. Key words: Sports, Blood, doping, haematocrit, EPO, steroids, diuretics, lance armstrong, blood volume, steroids

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

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

A worksheet designed for A-Level Biology students that reviews the meaning of key words related to ecology (population, community, ecosystem, etc). The worksheet includes questions on the ethics of conservation work carried out by ecologists and includes full answers at the end. Key words: Ethics, ecology, ecosystem, abiotic, biotic, conservation, population, community, niche, competition, risk, hazard

A resource aimed at post-16 biology students, this is a quiz requiring short, simple answers that focus on factual recall. The worksheet covers the structure of the lungs and airway passages (e.g. trachea, bronchus, bronchiole, alveolus) along with associated structures of the chest (e.g. intercostal muscles, diaphragm) and contains some extension questions requiring knowledge of lesser known structures. The worksheet also contains two application questions requiring an explanation of why individuals with emphysema often lack energy and why treatment of emphysema with pure oxygen can help alleviate the symptoms.

A resource aimed at advanced level biology students, this resource provides fifteen questions which require students to respond with the appropriate term relating to their understanding of meiosis. Useful as a starter or plenary exercise to consolidate understanding. Key words: meiosis, mitosis, diploid, haploid, homologous, chromosomes, cells, gametes

A worksheet aimed at advanced biology students, this resource is suitable as a lesson starter for a topic on gas exchange in fish. The worksheet requires students to consider the difference in circulatory system layout between a fish and a mammal before focusing on the differences between concurrent and counter-current exchange. Key words: fish, circulatory, counter-current, concurrent, blood, gas exchange, oxygen, carbon dioxide, gills, Fick's law, equilibrium, surface area, concentration gradient, exchange surface

A worksheet aimed at advanced biology students, this resource provides a series of questions to recap basic understanding (e.g. sequence the physiological events that occur during thermoregulation) followed by more developmental questions to challenge students and get them thinking more deeply about the topic and various contexts where it could be applied. Key words: thermoregulation, temperature, heat, heat loss, heat gain, sweating, shivering, vasoconstriction, vasodilation

A resource aimed at advanced biology students, this worksheet provides 27 'what am I?' quiz questions on the physiology of the digestive system. This is a good resource to use as a recap on key words and vocabulary (of which there is a great deal!) as well as checking on understanding. Key words: digestive system, mouth, oesophagus, peristalsis, stomach, intestine, gastrin, secretin, cckpz, endopeptidase, trypsin, chymotrypsin

A worksheet aimed at advanced level biology students who are just commencing a topic on photosynthesis. The worksheet can be set as a homework exercise prior to the topic commencing so that students have a head start on their understanding. The worksheet includes various prompts to focus their research along with a weblink for more detailed information. Keywords: photosynthesis, photosystems, chloroplasts, light dependent reaction, light independent reaction