Unit 9 Test Review

Which scientist first observed cells under a microscope by looking at cork?

• Charles Darwin

• Robert Hooke

• Louis Pasteur

• Anton van Leeuwenhoek

Which of the following best describes a part of the cell theory?

• All living things grow at the same rate.

• All living things are made of cells.

• Cells are made of living organisms.

• Only plants have cells.

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What is the basic unit of structure and function in all living organisms?

• The organ

• The nucleus

• The cell

• The mitochondrion

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According to cell theory, how do new cells form?

• From random molecules in the air

• They appear magically

• From pre-existing cells

• By dividing atoms

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Anton van Leeuwenhoek is known for which contribution to cell theory?

• Developing the first vaccine

• Observing living cells in pond water

• Discovering photosynthesis

• Identifying the nucleus

Which of the following is a unicellular organism?

• Tree

• Dog

• Bacteria

• Fish

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What is a key difference between prokaryotic and eukaryotic cells?

• Only eukaryotic cells have a nucleus.

• Only prokaryotic cells have DNA.

• Prokaryotic cells are larger than eukaryotic cells.

• Eukaryotic cells do not need energy.

Organisms that can make their own food are called:

• Heterotrophs

• Autotrophs

• Carnivores

• Decomposers

Which organism is an example of a multicellular heterotroph?

• Algae

• Dog

• Bacteria

• Sunflower

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Which type of cell lacks a nucleus?

• Eukaryotic

• Plant

• Prokaryotic

• Animal