Nature of Science and cell theory

Which statement is NOT a part of the scientific theory of cells?

• Cells are the basic unit of life.

• All cells come from other cells.

• All organisms are made of cells.

• Cells make up nonliving objects

In order to maintain homeostasis, which feature do plant and animal cells have in common?

• They take energy from food and release waste products. 

• They are able to make their own food. 

• They take in energy from the sun.

• They have a cell wall.

Why does the science community believe that living organisms are made up of cells?

• because scientists have confirmed the idea through debate and scientific investigation

• because scientists reported the finding of this idea to a congressional committee

• because scientists published their finding of the idea in several magazines

• because society approved the finding of the idea by voting in agreement

While not all scientific knowledge is based on experimentation, it is important to the practice of science to be able to distinguish between an experiment and other scientific investigations. Which investigation  best describes the basis of an experiment?

• comparing the ratio of weight to height for five breeds of dogs

• comparing the growth of seeds when half of the seeds are fertilized

• comparing the types of trees found in a sample area at two different locations 

• comparing the number of students with the same birth month in two different classes

Which structure  do plant and animal cells have in common?

• cell wall 

• chloroplast

• cell  membrane

• large central vacuole

Which statement describes how a tree growing from its seed material is an example of cell theory?

• All cells have a nucleus.

• All cells undergo photosynthesis.

• All cells are identical to each other.

• All cells come from pre-existing cells.

The two diagrams below show the history of cell-membrane models. What is the benefit of the updated model?

• The updated model has fewer details.

• The updated model shows the lipid bilayer.

• The updated model is a more accurate cell membrane representation.

• The updated model better represents the location of the cell membrane. 

What organelle is found in both plant and animal cells and generates energy for the cell?

• vacuole

• mitochondria

• chloroplast

• cell membrane

What is the difference between the function of the nucleus and mitochondria in both plant and animal cells?

• The nucleus uses genetic material (DNA) to direct cell activities. Mitochondria releases energy (ATP) for the cell.

• The nucleus uses genetic material (DNA) to direct cell activities. Mitochondria uses light energy to make food. 

• The nucleus controls what goes into and out of the cell. Mitochondria releases energy (ATP) for the cell.

• The nucleus controls what goes into and out of the cell. Mitochondria uses light energy to make food

The cell theory has changed many times since the discovery of the cell. Which sentence  best explains the changes to the cell theory?

• Scientists published ideas in the local newspaper.

• Scientists collected data in a controlled experiment.

• Scientists debated and confirmed scientific principles.

• Scientists discovered new evidence that led to new interpretations.