DC Biology Chapter 1, 2, and 3 Test Review

All cells contain nucleic acid (like DNA) held within a nuclear membrane.

• True

• False

Answer explanation

While it is true that all cells contain genetic material (DNA or RNA), prokaryotic cells (like bacteria and archaea) do not have their DNA inside of a nucleus.

Tags

NGSS.MS-LS1-2

Which of the following is the correct order of organization from smallest to largest?

• Organism -> Population -> Community -> Ecosystem

• Organism -> Community -> Population -> Ecosystem

• Organelles -> Tissues -> Cells -> Organs

• Cells -> Organelles -> Tissues -> Organs

Answer explanation

From smallest to largest the total levels of organization are: molecules -> organelles (tiny organs) -> cells -> tissues -> organs -> organism -> population (one species, one place) -> community (all living things in a place) -> ecosystem (all living and nonliving things in a place) -> biosphere (all life on Earth)

Tags

NGSS.MS-LS1-3

What are the 7 properties of life listed in the book?

Answer explanation

Order (cells), Energy processing, evolutionary adaptation, response to the environment, growth and development, reproduction, and regulation (homeostasis).

Arrange the steps of the scientific method in the correct order: analysis, conclusion, experiment, hypothesis, observation.

Tags

NGSS.MS-LS1-1

Which of the following claims is supported by the graph?

• The gastric enzyme and the intestinal enzyme are not affected by pH

• The gastric enzyme and the intestinal enzyme perform no differently under different pH conditions.

• The gastric enzyme performs optimally at a lower pH (acidic conditions) compared to the intestinal enzyme.

• The stomach has a lower pH than the intestine.

Answer explanation

While you may infer that the stomach has a lower pH than the intestine, the graph can only clearly tell us that the gastric enzyme performs better under lower pH than the intestinal enzyme.

What questions is attempting to be answered by this experiment, based on the graph?

Answer explanation

How are the gastric enzyme and intestinal enzyme affected by pH levels?

Tags

NGSS.MS-LS1-5

What is a null hypothesis? Give an example of a null hypothesis based on this experiment: Are bees more attracted to white, yellow, or blue flowers?

Answer explanation

The null hypothesis should state the flower color has no effect on the attraction of bees to that flower.

Name the control group based on this experiment: Are bees more attracted to white, yellow, or blue flowers?

Answer explanation

The control group is what the group without the independent variable, therefore, a flower with no color (more than one way to do this).

What is the independent variable based on this experiment: Are bees more attracted to white, yellow, or blue flowers?

Answer explanation

The independent variable is what the experimenter changes, therefore, the flower color. 

What is the dependent variable based on this experiment: Are bees more attracted to white, yellow, or blue flowers?

Answer explanation

The dependent variable is what the experimenter is measuring, therefore, the amount of times a bee visits a flower.