Unit 1 Practice Test (BIO.1A)

1. Matthias Schleiden and Theodor Schwann studied plant and animal cells under a microscope. Together, these men concluded that plants and animals are made up of cells. Which scientist furthered their study to complete our modern cell theory?

• Robert Hooke, who first observed cells and gave them their name.
• Anton van Leeuwenhoek, who observed living cells in a drop of pond water.
• Rudolf Virchow, who introduced the idea that all cells are created from other pre-existing cells.
• Ernst Ruska, who designed and built the first electron microscope.

2. Identify the three parts of cell theory (select 3).

• The cell is the basic unit of structure and function in all living organisms.
• Living organisms are made up of one or more cells.
• All matter is composed of chemical elements and compounds.
• Cells come from the reproduction of pre-existing cells.
• Cells may form spontaneously from inorganic compounds.

3. Which three (3) of the following are examples of characteristics found in ALL living things? (Select 3)

• Derek ate a candy bar to get a boost of energy.
• Jessica needs to breathe oxygen to survive.
• Lee moved around the classroom.
• Bob tasted a flower and quickly spit it out because it tasted bad.
• Justin’s cells contain DNA.

4. Which of the following is a reason that viruses are considered nonliving?

• Viruses can sense cells and attack them.
• Viruses contain either DNA or RNA.
• Viruses can mutate over time to create different strains.
• Viruses cannot use energy to function on their own.

5. What is the basic unit of structure in all living things?

• Cell
• Tissue
• Organ
• Organ system

6. A student collects several plants and pebbles from a riverbank, places them in an aquarium, and records observations for 15 days. The sizes of the plants increase, while the sizes of the pebbles remain the same. The student classifies the pebbles as nonliving things. Which criteria does the student use as the basis for the classification?

• Ability to grow
• Ability to move
• Ability to reproduce
• Ability to respond to stimuli

7. Use the diagram below to answer the question. Which number represents a multicellular organism?

• 1
• 2
• 3
• 4

13. What is the main distinguishing factor between matter being considered living or nonliving?

• The presence of elements
• The presence of atoms
• The presence of organic compounds
• The presence of cells

14. A scientist studies an object under a microscope. After careful study, the scientist concludes that the object does not represent a living organism. Which of the following would best justify the scientist's conclusion?

• The object cannot move on its own
• The object shows no signs of reproduction
• The object contains no evidence of cells
• The object does not appear to be growing or developing

16. Blood, made up of red blood cells and white blood cells, work together to form which level of organization?

• Cell
• Tissue
• Organ
• Organ system