Section 2: Conduct internet research on your selected ecosystem to help you generate a list of the criteria and
two constraints. Your criteria and constraints should consider relevant factors to the problem, such as costs,
reliability, safety (to humans and wildlife), human needs, environmental impact, local biodiversity, and the
aesthetics of the area. List the criteria in order of most to least important and assign each to a related
sub-problem. In the rationale column, explain why you placed your criteria in the order you selected.

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

What processes would you expect to be key in the production of yogurt ?

Are gametes exactly the same? explain why or why not?