A phenotypic ratio for a dihybrid cross is predicted to be 9:3:3:1. The experimental values are purple smooth = 75, white smooth = 28, purple wrinkled = 24, white wrinkled = 8. Account for the difference between the expected and experimental values.

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 role do traits play in affecting an organisms ability to reproduce? finches

Talking listening and reacting non verbally are all part of communicating