Ib biology Study guides, Class notes & Summaries

Which structures is found in all prokaryotic cells? - correct answer Ribosomes, Plasmid, Pili. (some only have Flagellum & Cell Wall) Features found in most plant and animal cells? - correct answer cytoplasm, mitochondria, ribosomes Size of the diameter for most cells is..? - correct answer 10 m to 100 m functions of a membrane protein? - correct answer Enzymatic activity, Channels, Cell-to-cell recognition, cell-structure, hormone binding sites. Why is the genetic code descr...

cell theory - ️️- all living things are composed of cells - the cell is the smallest unit of life - cells only arise from pre-existing cells challenges to the cell theory - ️️- *striated muscle* challenges the idea that a cell has one nucleus - *giant algae* challenges the idea that cells must be simple in structure & small in size - *aseptate fungal hyphae* challenges the idea that a cell is a single unit functions of life - ️️- metabolism - response - homeostasis - gro...

What are the characteristics common to all forms of life? - correct answer reproduction, carbon, responds to surroundings, Growth and Development, cellular organization, and energy What are the levels of biological organization from simple to most complex? - correct answer Molecules, cell, tissue, organ, organism, population, community, ecosystem, biosphere What are the 4 most common types of biological molecules? - correct answer Proteins, nucleic acids, carbohydrates, and lipids Organ...

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 at same time Community a number of different populations living and interacting in the same area (all the living things in an area) Ecosystem a comm...

IB Biology Midterm Study guide Exam Questions With 100% Correct Answers 1. Which are examples of homologous structures? A. The wings of bats and butterflies B. The fins of fish and whales C. The hindlimbs of frogs and grasshoppers D. The forelimbs of primates and penguins - answerD. The forelimbs of primates and penguins 2. Which is an example of natural selection? A. A giraffe stretching its neck to reach higher leaves B. A juvenile bird learning to sing C. Development of antibiotic ...

IB Biology HL Questions And Answers 2023 Update A+ What are the characteristics common to all forms of life? - Answer-reproduction, carbon, responds to surroundings, Growth and Development, cellular organization, and energy What are the levels of biological organization from simple to most complex? - AnswerMolecules, cell, tissue, organ, organism, population, community, ecosystem, biosphere What are the 4 most common types of biological molecules? - Answer-Proteins, nucleic acids, carb...

Water properties: • Cohesion: like molecules attract to each other • Water is a polar molecule that forms a hydrogen bond with other water molecules. • The negatively charged oxygen atom of one water molecule forms a hydrogen bond with a positively • charged hydrogen atom of another water molecule. This attractive force between these molecules is called cohesion which helps plants draw water from the root through the xylem to the leaf • Adhesion: unlike molecules attract to eac...

IB biology past essay questions HL and SL all units and mark scheme 2023 (A+) Outline what is meant by the trophic level of an organism with three examples from one named habitat. (4 max) - Answer-feeding level for an organism in a food chain naming of habitat (1 mark) naming three trophic levels correctly (1 mark) three examples forming a food chain from the named habitat (1 mark) 2. Compare the ways in which autotrophic, heterotrophic and saprotrophic organisms obtain energy. (6 ma...

IB biology past essay questions HL and SL all units and mark scheme 2023 (A+) Outline what is meant by the trophic level of an organism with three examples from one named habitat. (4 max) - Answer-feeding level for an organism in a food chain naming of habitat (1 mark) naming three trophic levels correctly (1 mark) three examples forming a food chain from the named habitat (1 mark) 2. Compare the ways in which autotrophic, heterotrophic and saprotrophic organisms obtain energy. (6 ma...

What are the characteristics common to all forms of life? - ️️reproduction, carbon, responds to surroundings, Growth and Development, cellular organization, and energy What are the levels of biological organization from simple to most complex? - ️️Molecules, cell, tissue, organ, organism, population, community, ecosystem, biosphere What are the 4 most common types of biological molecules? - ️️Proteins, nucleic acids, carbohydrates, and lipids Organelle - ️️any of a numbe...