Who was one of the first people to identify and see cork cells?

• Anton van Leeuwenhoek

• Robert Hooke

• Matthias Schleiden

• Rudolf Virchow

The work of Schleiden and Schwann can be summarized by saying that

• a. all plants are made of cells.

• b. all animals are made of cells.

  c. plants and animals have specialized cells.

• c. plants and animals have specialized cells.

• d. all plants and animals are made of cells.

Which of the following is NOT a principle of the cell theory?

• a. Cells are the basic units of life.

• b. All living things are made of cells.

• c. Very few cells reproduce.

• d. All cells are produced by existing cells.

The cell theory applies to

• bacteria

• plants and animals

• multicellular organisms

• all of the above

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-3

Electron microscopes can reveal details

• a. 100 times larger than those visible in light microscopes.

• b. the same size as those visible in light microscopes.

• c. 100 times smaller than those visible in light microscopes.

• d. 1000 times smaller than those visible in light microscopes.

Which type(s) of microscopes can produce three-dimensional images of cells?

• a. transmission electron microscopes

• b. scanning electron microscopes

• c. both A and B

• d. neither A nor B

Researchers use fluorescent labels and light microscopy to

• a. produce movies of cells as they grow, divide, and develop.

• b. scan cells with laser beams.

• c. follow molecules moving through the cell.

• d. build three-dimensional images of cells.

Prokaryotes lack

• cytoplasm

• a cell membrane

• a nucleus

• genetic material

Which of the following contain a nucleus?

• prokaryotes

• bacteria

• eukaryotes

• organelles

Eukaryotes usually contain

• a nucleus

• specialized organelles

• genetic material

• all of the above