(a) Explain why these are examples of pentadactyl limbs (2) (b) Explain why the pentadactyl limb provides evidence for evolution (3)

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

How does photosynthesis show the conservation of mass and energy?

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes