Homework pg. 246-253 ?1-5

Question 1) Compare and contrast atoms and molecules.

Answer: An atom is made of electrons, protons, and neutrons. Molecules are groups of atoms.

Question 2) Describe the differences between an organic and an inorganic compound. Given an example of each type of compound.

Answer:Organic compounds contain carbon and hydrogen while inorganic compounds contain no hydrogen or carbon.

Question 3) List the four types of organic compounds found in all living things.

Answer: Carbohydrates, lipids, proteins, and nucleic acids are found in all living things.

Question 4) Infer why life as we know it depends on water.

Answer:We need water to live, to transport materials in our body, and we are composed of more than 50% of water in our bodies.

Question 5) Think Critically If you mix salt, sand, and sugar with water in a small jar, will the resulting mixture be a suspension, a solution, or both?

Answer: This mixture will be a solution. It is a solution because you are mixing three things together, and it isn't a suspension because there is no liquid for the dry compounds to sink it.

Pg. 232-235 Questions 1-4

Question 1) List the steps an active virus follows when attacking a cell.

First, a virus attaches to a cell, then the virus's hereditary material enters the cell, the the material makes the cell make viral hereditary material and protein. After that, viruses form inside the cell, and the viruses release out of the cell.

Question 2) Compare and contrast a latent virus and an active virus. Give an example of each.

An active virus makes new cells, when a latent virus attaches to the hereditary material of the cell, when the cell divides, so does the virus. An active virus is chickenpox, when a latent virus is a cold sore.

Question 3) Explain how vaccines prevent infection.

Vaccines prevent infection because when you are immunized, the shot is actually the sickness itself, but at such a low amount you body builds interferons to be immune to the infection.

Question 4) Infer how some viruses might be helpful.

Some viruses might be helpful because, using gene therapy, doctors and scientists can replace defective heredity cells with the virus heredity cells, which might somehow lead to a cure for genetic disorders and cancer.

Homework date: 2-18-10

Question #1: Explain the purpose of classification.

The purpose of classification is to classify organisms with similar structures.

Question #2: Identify what information a scientist would use to determine an organism's phylogeny.

To find an organism's phylogeny, you can use fossils, hereditary information, and the early stages of development.

Question #3: Think Critically why would a field guide have common names as well as scientific names?

A field guide would have common and scientific names because the common names would be useful for ordinary people who don't know the scientific names, and scientific names would be needed because they have to avoid mistakes, to know the same genus, to give descriptions, and to organize data well.

Question #4: Classify Create a dichotomous key that identifies types of cars.

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