Science help!!?

Question

I've looked everywhere and cannot find these answers.

1. List the 3 observations that Charles Darwin used to develop the scienctific threory.

2.Explain how photosynthesis changed the coarse of evolution.

3.Electrons are distributed in orbitals that contain a maximum of ___________

The orbitals comprise shells within atoms with the following maximum electrons shell :

first shell can hold _______

second shell can hold _______

third shell can hold ________

4. Van der Waals forces are _________

5.Energy is either _________ or ________

6. Fuel is converted to carbon dioxide and water, while energy is released as heat and light.

In living cells exothermic reactions occur in multipl steps. Give 2 examples of multiple biochemical pathways.

7.

complete the chart.

Complex Polymer | Simple polymer | monomer

1. Polysaccharide |

(carbohydrate) |

2. Polypeptide |

(protein) |

3. Nucleic acid |

(DNA RNA) |

4. Lipid

Answer 1

http://search.yahoo.com/search;_ylt=A0oG...

Answer 2

I'll help a little...

1. First you need to know what the scientific theory is.  

a) You make an observation

b) You make an assumption about that observaion

c) You test your assumption

d) You see if your assumption is right or wrong

...so What did Darwin do as he was traveling to those islands?  Was he observing differences in animals on each island?  Was he making assumptions about them?  Did he test his assumptions?

2. For this one you must know what photosynthesis is.  In simple terms it is how plants convert light energy into chemical energy.  Chemical energy in the form of plant starches provides energy for all herbivores in the food chain.   Now you can make your assumptions off of this information to answer your question.

3. Can't help on this one without giving away the answer

4. same here

5. same here

6. think of the electron transport chain

7. I won't give this one away, just know that poly means many, nucleic acids are single molecules, and lipids are composed of fatty acids.

3.