IB Biology Study guides, Class notes & Summaries

AQA AS BIOLOGY 7401/1 Paper 1 Version: 1.0 Final *JUN* IB/M/Jun23/E8 7401/1 For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 TOTAL Monday 15 May 2023 Morning Time allowed: 1 hour 30 minutes Materials For this paper you must have: • a ruler with millimetre measurements • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in t...

IB Biology Ch2 Molecular Biology Latest Update 100% Correct Most common elements found in living organisms Carbon, Hydrogen, Oxygen, Nitrogen. Organic molecules Compounds that contain atleast two Carbon Inorganic molecules Compounds that do not contain Carbon Monomers Small subunits Polymers When many monomers are bonded together Monosaccharides Single sugars made up of just one subunit. Disaccharides Are sugars that have two subunits linked together by a condensation reacti...

IB Biology Year 1 Review with Complete Solutions ecology the study of relationships between living organisms and between organisms and their environment ecosystem a system made up of organisms as well as the abiotic factors in the area population a group of organisms of the same species who live in the same area at the same time community a group of populations living and interacting with each other in an area species a group of organisms which can interbreed and produce fertile offsprin...

IB Biology Chapter 2 Latest 2024 Graded A+ Vitalism Idea that living organisms are fundamentally different from non living things Most frequently occurring elements Oxygen 65% Carbon 19% Hydrogen 10% Nitrogen 3% Other elements Calcium 1.5% Phosphorus 1% Iron 0.7% Sulfur 0.25% Sodium 0.15% Molecular biology Science that aims to explain living processes in terms of chemical substances Synthesis of urea Discovered in human urine in the 18th century Organic compound synt...

IB Biology HL Exam Review Latest Version Already Graded A Outline the cell theory. Living organisms are composed of cells. Cells are the smallest unit of life. Cells come from pre-existing cells. Discuss the evidence for the cell theory. The nature of scientific theories could be introduced here: the accumulation of evidence that allows a hypothesis to become a theory; whether a theory should be abandoned when there is evidence that it does not offer a full explanation; and what evid...

IB Biology Topic 2: Molecular Biology Latest Update Graded A+ How many bonds can carbon make carbon can make four covalent bonds Four most common compounds - carbon -hydrogen -nitrogen -oxygen what is life based on carbon compounds metabolism metabolism- chemical processes in the body, synthesis & breakdown of substances in living organisms. anabolism- the synthesis of complex molecules (simple to complex) (condensation reaction) catabolism- the breakdown of complex molecu...

IB Biology Topic 4 : Ecology Latest Version Graded A+ Ecology The science of the relationships between organisms and their environments. Organism an individual living thing that uses energy, reproduces, responds, grows, and develops Species a group of similar organisms that can breed and produce fertile offspring Population group of individuals of the same species that live in the same area Community all living, or biotic, things in an area Ecosystem all biotic (living) and...

IB Biology Topic 1: Cell Biology Latest Update Graded A Cell theory The theory that cells form the fundamental structural and functional units of all living organisms. Differentiation The expression of a particular gene(s) and not others in order for cell specialisation. Emergent properties The idea that the sum of an organism is more than the parts interacting and combining. Living things become more complex as they move (from individual cells to organ systems). Multicellular...

IB Biology - 1.1 Introduction to Cells Questions and Answers Graded A+ Main components of cell theory 1. All living things are made up of one or more cells 2. All cells come from pre-existing cells 3. Cells are the fundamental building blocks of all living organisms Smaller organisms are what type of cellular? Unicellular Larger organisms are what type of cellular? Multicellular Common features of cells? 1. Every cell is surrounded by a membrane, which separates the cell contents...

IB Biology Unit 1 (Cell Biology - SL) Latest Update Graded A+ Cell Theory all living things are made up of cells, all cells come from previous cells, the cell is the basic fundamental unit of life Functions of life that the cell must carry out -Nutrition: obtaining food, to provide energy and the materials needed for growth - Metabolism: chemical reactions inside the cell, including cell respiration to release energy -Growth: an irreversible increase in size -Response: the ability ...