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IB Biology Final Exam Review questions with correct answers
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IB Biology Final Exam Review questions with correct answers
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IB Biology Final Exam Review questionswith correct answers
taxonomy hierarchy - .......🔷ANSWERS🔶......✔✔ Domain
kingdom
phylum
class
order
family
genus
species
Discuss how different types of isolation contribute to speciation. - .......🔷ANSWERS🔶......✔✔ any
type of isolation can contribute if it prevents interbreeding/prevents gene flow
geographical isolation is (probably) the commonest method
physical barrier/long distance prevents interbreeding
islands/mountain ranges/other barrier
ecological isolation is harder to achieve
populations occupy different habitats in the same area
flower at different times/have different mating season
, natural selection must act differently on the two populations
populations must diverge sufficiently enough for interbreeding to be impossible
behavioral isolation
structural isolation
a small gene pool so any mutations show more quickly
Discuss possible exceptions to cell theory. 4 marks - .......🔷ANSWERS🔶......✔✔ skeletal muscle
fibers are larger/have many nuclei/are not typical cells
fungal hyphae are (sometimes) not divided up into individual cells
unicellular organisms can be considered acellular because they are larger than a typical cell/carry
out all functions of life
some tissues/organs contain large amounts of extracellular material
Explain how the surface are to volume ratio influences cell sizes. 3 marks
- .......🔷ANSWERS🔶......✔✔ small cells have larger ratio (than larger cells)/ratio decreases as size
increases
surface area/membrane must be large enough to absorb nutrients/oxygen/substances needed
surface area/membrane must be large enough to excrete/pass out waste products
need for materials is determined by (cell) volume
cell size is limited (by SA/Volume ratio)/cells divide when they reach a certain size
reference to diffusion across/through membrane/surface area
State one function of each of the following organelles: lysosome, Golgi apparatus, rough
endoplasmic reticulum, nucleus, mitochondrion. 5 marks - .......🔷ANSWERS🔶......✔✔ lysosome:
hydrolysis/digestion/break down of materials
Golgi apparatus: synthesis/sorting/transporting/secretion of cell products
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