Ib bio Study guides, Class notes & Summaries

IB Bio HL I Semester 1 Exam Review with Certified Solutions Outline the Cell Theory -All organisms are composed of one or more cells -Cells are the smallest unit of life -All cells come from pre-existing cells Discuss the evidence for Cell Theory -Robert Hooke uses microscope to observe living cells -Louis Pasteur performs chicken broth experiment to prove that cells come from pre-existing cells Outline the therapeutic uses of stem cells -Implanted stem cells to rebuild brain tissue for ...

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 Topic 6 Latest Update 100% Pass pathogen any disease-producing agent (especially a virus or bacterium) antigen any surface protein that may elicit an immune response or cell recognition digestion the process where food is converted into smaller molecules that can be absorbed into the body enzymes globular proteins that speed up chemical reactions in the body amylase enzyme found in saliva and pancreatic juice that breaks the chemical bonds in starches protease e...

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 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 Paper 1 Questions And Answers Already Passed Prokaryote or Eukaryote in paramecium? Compartments in the cell indicates that it's a eukaryote Property of water which makes it suitable for living? Thermal Watson and Crick discovery about DNA DNA is double helix What occurs in meiosis but not in mitosis? Homologous chromosomes pair up Variation within a population Fertilization and mutation properties of stem cells they can differentiate phospholipid bilayer the...

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 ...

IB Biology: Evolution Questions and Answers Already Passed What is a theory? A comprehensive explanation of some aspect of nature (vs a hypothesis, which is just a prediction as to the result of an experiment). What were some ideas from Darwin's time that influenced his work? French naturalist Buffon in the mid-1700s studied fossils and said the Earth must be older than previously assumed; Lamarck in the early 1800s proposed that life changes over time. Define acquired vs heritab...

IB Biology - Unit 1 - Cell Biology Latest Version 100% Pass Cell Theory The theory that cells form the fundamental structural and functional units of all living organisms Unicellular A single celled organism Multicellular Made up of more than one cell. Prokaryotic A small single cell lacking a nucleus or any other membrane-bound organelles. Bacterial cells are an example Eukaryotic A cell characterized by the presence of a nucleus and other membrane-bound organelles. Eukaryo...