Characteristics of Life/Cell Theory

What scientist first introduced the idea that all plants are made up of cells

• Robert Hooke

• Anton van Leeuwenhoek

• Matthias Schleiden

• Theodor Schwann

Tags

NGSS.MS-LS1-1

What is NOT a characteristic of life?

• Reproduce

• made up of one or more cells

• maintain homeostasis

• movement

What did Robert Hooke discover/observe?

• improving the microscope lens

• the ideal that all cells come from preexisting cells

• the first person to observe cells while looking at slices of cork. He gave cells their name.

• living cells in a drop of pond water with a simple microscope.

What scientist is recognized for improving the microscope lens?

• Robert Hooke

• Anton Van Leeuwenhook

• Matthias Schleiden

• Theodor Schwann

What of the following is not true about viruses?

• multiply but only if attached to a host

• infect all types of life

• don't contain any nucleic acid (DNA)

• are smaller than bacteria

List the 8 characteristics of life

Answer explanation

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

2. All living things reproduce

3. All living things grow and develop

4. All living things have a genetic universal code

5. All living things maintain a stable internal environment

6. All living things respond to the environment

7. All living things acquire and use energy

8. All living things change over time

Tags

NGSS.MS-LS1-6

What are the steps of the scientific method?

Answer explanation

1. State the problem/question

2. Form the hypothesis

3. Design and perform the experiment

4. Draw a conclusion

5. Theory

Tags

NGSS.MS-PS2-2

What is an independent variable?

• not changed during the experiment, stays the same

• manipulated variable, what is being changed intentionally during the experiment

• receives the placebo effect

Tags

NGSS.MS-PS2-2

What is the dependent variable?

• It changes as a result of the independent variable

• The control

• manipulated during the experiment

When you step out into the cold, your body shivers in order to keep its temperature at 98.6^oF.

• All living things use energy
• All living things contain cells
• All living things maintain homeostasis
• All living things grow and develop

Tags

NGSS.HS-LS1-3