Presentation on theme: "1 Review Identify two reasons why a cell’s growth is limited"— Presentation transcript:
11 Review Identify two reasons why a cell’s growth is limited Explain As a cell’s size increases, what happens to the ration of its surface area to volume ratioApplying Concepts Why is a cell’s surface to volume ratio important2 Visual Thinking The formula for finding the surface of area of a sphere is A=4πr2. The formula for finding the volume of a sphere is V=4/3r3.Calculate the surface areaand the volume for the baseballand basketball. Then write theratio of surface are to volume for each.Baseball r = 3.6 cm Basketball r = 12.2 cm
2Ch 10 Cell Growth and Division 10.1 Cell Growth, Division, and Reproduction
3Limits to Cell SizeThe larger a cell becomes, the more demands the cell places on its DNA.The larger a cell grows the less efficient in moving nutrients and waste materials across its cell membrane.
4DNA Information is used to build the molecules needed for cell growth The bigger the cell- the more the information is needed.
5Exchanging Materials Nutrients and wastes pass through cell membrane The greater surface area the more materials that can passKey is surface area to volume.
6Cell Division The splitting of a larger cell into two “daughter” cells Cell makes a second copy of its DNAReduces cell volume so it increases surface area to volume ratio.
7Asexual Reproduction Involves a single parent Produces genetically identical offspringSimple, efficient, and effective to produce many offspringBinary fission and budding.
8Good and Bad of Asexual Reproduction SimpleDon’t need to find a mateQuickNo genetic variability.
9Sexual ReproductionOffspring are produced by the fusion of two sex cells one from each of two parentsOffspring are genetically differentMost animals and plants, and many single-celled organisms.
10Good and Bad of Sexual Reproduction Increased variabilityGenerally need two individualsMore complexGreater investment.