IB Biology HL Questions And Answers 2023 Update A+

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, carbohydrates, and lipids Organelle - Answer-any of a number of organized or specialized structures in a living cell Cell - Answer-The smallest structure and functional unit of an organism. Tissue - Answer-The material of specialized cells and their products that make a wall of cells and their products Organ - Answer-a part of an organism that is self-contained and serves a function Organism - Answer-an individual animal, plant, or single-celled life form What are the similarities and differences of a population and an ecosystem? - Answer-a population and ecosystem both include organisms, however a population is one type of species while an ecosystem is both biotic and abiotic things. What is the definition of emergent properties? - Answer-the feature that can't be directly from the features of its simpler parts eg. the taste of salt w/ the combination of Na+Cl What are the 4 shared characteristics of cells? - Answer-DNA, cytoplasm, ribosome, and plasma membranes What is the definition of unicellular organisms? - Answer-an organism that consists only of 1 cell eg. bacteria/microorganisms What is the definition of multicellular organisms? - Answer-an organism that consists of multiple cells eg. human What are the similarities and differences between prokaryotic and - Answer-eukaryotic cells? Prokaryotic cells have no nuclei, unlike Eukaryotic cells. Both are enclosed by membranes and have DNA. Prokaryotic cells have no independent organelles, except for the organelle of ribosome How do the cells in multicellular organisms become specialized? - Answer-By controlling what DNA is expressed in one cell, because all of the cells in an organism have the same DNA, but only express some. This might include how tight the bindings of the protein are, and if protein is made what the microRNAs do What is sexual reproduction? - Answer-the production of a new living organism by combining genetics of 2 different sexes/fusion of 2 gametes What is asexual reproduction? - Continues...