0.4 Explain how the Learning activities: Students could The relationship weeks size of an organism undertake the HBI3T get students to make multilink between the size or affects its surface ISA Q from 2012 cubes, increasing in size structure of an organism area to volume ratio (allow and investigate the effect on and its surface area to and why this is longer SA:vol ratio volume ratio. Past exam paper important. if get students to calculate the material: Apply your Changes to body shape doing surface area and volume of knowledge of and the development of BIOL2 June 2012 Q1a the the and work out the surface area to systems as adaptations full ratios. Ask them to draw BIO3X 2013 EMPA volume ratio, to that facilitate exchange ISA in conclusions linking SA:vol explain adaptations as this ratio reduces. class) ratio to diffusion to body shape or question about the the development of consequences for larger exchange systems. organisms Describe and teacher led explanation as to explain the how this has led to the relationship development of exchange between surface surfaces and mass transport area to volume ratio systems, or a change to body and metabolic rate. shape in larger organisms Calculate surface think, pair, share: do animals area to volume with a larger SA:vol ratio have ratios when a higher or lower rate of supplied with metabolism? Question and cell/organism discuss to arrive at the correct dimensions. answer exam questions.
The relationship between the size or structure of an organism and its surface area to volume ratio. Changes to body shape and the development of systems as adaptations that facilitate exchange as this ratio reduces. 0.4 weeks (allow longer if doing the full ISA in class) Explain how the size of an organism affects its surface area to volume ratio and why this is important. Apply your knowledge of surface area to volume ratio, to explain adaptations to body shape or the development of exchange systems. Describe and explain the relationship between surface area to volume ratio and metabolic rate. Calculate surface area to volume ratios when supplied with cell/organism dimensions. Learning activities: get students to make multilink cubes, increasing in size and investigate the effect on SA:vol ratio get students to calculate the surface area and volume of the and work out the ratios. Ask them to draw conclusions linking SA:vol ratio to diffusion question about the consequences for larger organisms teacher led explanation as to how this has led to the development of exchange surfaces and mass transport systems, or a change to body shape in larger organisms think, pair, share: do animals with a larger SA:vol ratio have a higher or lower rate of metabolism? Question and discuss to arrive at the correct answer exam questions. Students could undertake the HBI3T ISA Q from 2012 Past exam paper material: BIOL2 June 2012 Q1a BIO3X 2013 EMPA