Microscopy and Cell Theory

Which historical event most directly contributed to the development of the cell theory?

• The discovery and classification of thousands of species of organisms.

• The development of microscopes and higher powered lenses.

• The development of theories of natural selection on evolution of organisms.

• The discovery that DNA is the genetic material

The smallest unit that can carry out ALL activities associated with life is —

• a tissue

• the cell

• the atom

• the organelle

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According to the cell theory —

• all organisms are composed of tissues

• animals are composed of cells, but plants are not

• the smallest unit of life is an atom

• All living things are made up of cells

Who was one of the first people to observe living organisms using a microscope?

• Anton Van Leeuwenhoek

• Rudolf Virchow

• Charles Darwin

• Matthias Schleiden

Robert Hooke was known for which of the following?

• Proposed that cells reproduce through cell division.

• Noted that all plants are made from cells

• Observed that cells have a dark central body called a nucleus

• Was the first to see cells and gave them their name

Not until the contributions of which scientist did the public begin to understand the connection between the formation of new cells and other living cells? “Cells arise from other cells.”

• Virchow

• Schleiden

• Schwann

• Leeuwenhoek

Matthias Schleiden was a botanist who first noted -?

• Both plants and animals are made from prokaryotic cells

• All plants are made up of cells

• Cork cells contained many small empty compartments

• Animal tissues are composed of cells

To which scientist is attributed the idea that ALL living things are made up of cells? Hint: He first said that all animals are made of cells.

• Leeuwenhoek

• Schleiden

• Schwann

• Hooke

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When the German biologist Theodor Schwann expanded the cell theory to include not only plants but also animals, he was including which two areas of study?

• Horticulture and Histology

• Microbiology and Limnology

• Botany and Zoology

• Entymology and Anatomy

Which of these supports the cell theory as it is stated today?

• All organisms are composed of more than one cell.

• Cells must contain a nucleus.

• Not all cells are alive.

• New cells are produced by division of existing cells.

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