Lesson 1 The Cell as a System

What are the basic needs of a cell?

• Nutrients, water, oxygen, suitable environment

• Love, happiness, friendship

• Money, fame, success

• Sunlight, carbon dioxide, minerals

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Name the building blocks of living organisms.

• Rocks

• Molecules

• Cells

• Clouds

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Humans are ………………………… organisms

• unicellular

• prokaryote

• multicellular

• simple

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An unaided human eye can see an object ………………………… millimeters long

• 0.01

• 0.005

• 0.5

• 0.001

How do cells obtain energy for their functions?

• Cells obtain energy by photosynthesis

• Cells obtain energy through fermentation

• Cells obtain energy by absorbing sunlight directly

• Cells obtain energy through cellular respiration by breaking down glucose molecules to produce ATP.

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An unaided human eye can’t see all the following, except ………

• an onion’s cell

• a skin’s cell

• a bacterial cell

• a bird’s unfertilized egg cell

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A living organism grows and reproduces by increasing the ………………………… of its body cells

• number

• size

• volume

• length

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All the following are multicellular living organisms, except ……

• a. a bean plant

• b. a cat

• c. bacteria

• d. a human

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The ………………………… regulates the substances that pass in or out of the cell

• nucleus

• plasma membrane

• cell wall

• cytoplasm

Which statement about the cells is false

• a. All living organisms are composed of cells.

• b. All cells come from existing cells.

• c. Most cells are microscopic in size.

• d. All cells have a nucleus.

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