Biology Extended Essay Questions – Addressed by an EE Examiner Q1. Should students be encouraged to do an original piece of research‚ or should they analyze (in a new way) data that someone has collected (e.g.‚ data obtained from a previous research study that perhaps has been published in a journal)? If they use existing primary data‚ I am assuming that they will still carry out an actual experiment??? Answer: IB allows students to do science extended essays that are of two main ’types’.
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`Biology B1 Revision Classification • Organisms were based into groups based on their characteristics (classification). • Kingdom‚ Phylum‚ Class‚ Order‚ Family‚ Genus‚ Species Kingdom Main Characteristics Animalia Multicellular; heterotrophic feeders so no chlorophyll‚ no cell walls; complex cell structure with nucleus Plantae Multicellular; autotrophic feeders using chlorophyll; cell walls made of cellulose; complex cell structure with nucleus Fungi Multicellular; cell walls not made
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Biology Midterm Review 1.1 • The goal of science is to investigate and understand the natural world‚ to explain events in the natural world‚ and to use those explanations to make useful prediction • Scientific thinking usually begins with observation‚ the process of gathering information about events or processes in a careful -observation generally involves using the senses esp. hearing & sight -the information gathered from observations is called data. • Quantitative date expressed as number
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biology FOLIO BIOLOGY POLLUTION NIK ‘AINAA SYAKIRAH BT NIK GHAZALI 5 IBNU SINA INTRODUCTION Pollution is the introduction of contaminants into a natural environment that causes instability‚ disorder‚ harm or discomfort to theecosystem i.e. physical systems or living organisms. It can also be define as any undesirable changes in physical‚ chemical or biological characteristics of the natural environment‚ brought about when harmful substances or energy released by human activities. Pollution
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A central organizing concept in biology is that life changes and develops through evolution‚ and that all life-forms known have a common origin. The theory of evolution postulates that all organisms on the Earth‚ both living and extinct‚ have descended from a common ancestor or an ancestral gene pool. This last universal common ancestor of all organisms is believed to have appeared about 3.5 billion years ago.[21] Biologists generally regard the universality and ubiquity of the genetic code as definitive
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AP Biology Study Guide Chapter 11 1. Categorize chemical signals in terms of the proximity of the communicating cells. Local signaling – a. Paracrine signaling – a secreting cell acts on nearby target cells by discharging molecules of a local regulator (a growth factor‚ for example) into the extracellular fluid. b. Synaptic signaling – a nerve cell releases neurotransmitter molecules into a synapse‚ stimulating the target cell. Long distance signaling- c. Hormonal signaling – specialized
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single celled organisms. Cells are the basic building blocks of life and are found in all living things. For example‚ a group of cells would form a tissue‚ a group of tissues would form an organ‚ a group of organs would form an organ system an a group of organ systems would form an organism. Different forms of life exist in the planet with human beings. Organisms like plants‚ animals‚ mammals‚ bacteria and many more. These organisms are divided into groups:- Animalia‚ Plantae‚ Protista‚ Archaea
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HOMEOSTASIS BIOLOGY I BIO091 Prepared by: Nur Syakireen Bt. Ishak SCOPE •Definition and importance of homeostasis •Homeostatic organ •Negative and positive feedback mechanisms •Blood-glucose regulation •Thermoregulation •Osmoregulation DEFINITON & IMPORTANCE OF HOMEOSTASIS Homeostasis • Homeostasis: • is the steady state of physiological condition of the body. • it is the physiological processes by which organisms maintain a constant & balanced internal environment. • In achieving
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Homeostasis is the ’maintenance of equilibrium in a biological system by means of an automatic mechanism that counteracts influences tending towards disequilibria’. Homeostatic mechanisms operate at all levels within living systems‚ including the molecular‚ cellular‚ and population levels. in humans homeostasis involves the constant monitoring and regulating of numerous factors including‚ oxygen and carbon dioxide levels‚ nutrient and hormone levels and inorganic and organic substances. The concentrations
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Biology Notes: Threats to biodiversity in MA 1. Climate change: temp‚ sea levels‚ precipitation 2. Non climate threats such as habitat loss‚ habitat fragmentation‚ and invasive species and air and water pollution Fragmentation: often due to man (dams‚ roads‚ and general development) Elements of biodiversity: Species‚ ecosystems & landscapes Mammals from bats to bears Bats got the white nose fungus which caused the bats to die and the insect population flourished because the bats main job
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