Science Fall Review

Biology: Fall Final Review

Doan Bien

Biology

Period 4

Indtroduction to Biology

1. Define the goal of science.

1. To investigate & Understand nature.

2.To explain things in nature.

3. To use explanations to predict.

2. What does biology study?

Life

3. Why does a hypothesis need to be testable?

So it can be proven true.

4. How is a hypothesis formed?

Observations

5. In a experiement, what is a variable and what is a controlled variable?

6. Why is it important to onlt test one variable in an experiment?

So, it doesn't interfere with another, thus ruining your hypothesis.

7. What is a theory? How are theories developed?

Theory: Your explanation from experience, proof, and support from hypothesis. If data is wrong, hypothesis becomes a theory.

8. List the steps of scientific method.

9. List the properties of life. Are they all required for an organism to be living?

1. Cellular Organization

2. Homeostasis

3. Metabolism

4. Reproduction

5. Genetic Code

-Yes, they are all required.

10.What is homeostasis and why is it important?

Homeostasis: process by which all living things mantian a stable internal environmental temperature. So they don't freeze or heat to death. Regulates inner temperature.

11. What is the smallest living unit?

Cell

12.Who discovered the cell?

Robert Hooke & Antom Van Leewenhoek

13.What is the cell theory? Describe its three parts.

1. All living things are made of 1 or more cells.

2. In organisms, cells are basic unit of structure & function.

3. Cells are made from only existing cells.

14.What are the three basic parts of a cell?

Plasma (cell) membrane, Cytoplasm, Nucleus

15.What are two types of cells? Describe characteristics of each.

Prokaryotes: Eukaryotes:

-3.5 Billion yrs. old -1.5 Billion yrs. old

-Simple -Complex

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16.Name at least 2 differences between prokaryotes and eukaryotes.

Prokaryotes: Eukaryotes:

-No nucleus or membrane (organelles) -Have Nucleus & membrane...