Levels and Cell Theory

Hepatocytes are the main type of cells in the liver. Hepatocytes

combine to form the next more complex level of organization, called –

• A an organ.

• B a tissue.

• C an organism.

• D an organ system

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Which of the following examples best represent the levels of organization

from least to most complex?

• A Lung cell ➔ lung tissue ➔ lung ➔ respiratory system ➔ human

• B Human ➔ lung tissue ➔ respiratory system ➔ lung cell ➔ lung

• C Lung cell ➔ respiratory system ➔ lung tissue ➔ lungs ➔ human

• D Respiratory System ➔ lungs ➔ body cell ➔ lung tissue ➔ human

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The liver is a collection of tissues that metabolize nutrients in the

body. The liver is an example of –

• A an organism.

• B a cell.

• C an organ.

• D an organ system.

Neurons rapidly communicate information throughout the body.

Neurons combine to form tissue in the organ known as the brain.

Neurons are classified as -

• A cells.

• B tissues.

• C organs.

• D organisms.

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The roots of a plant help to anchor the plant to the soil, and are

also used for food storage and water extraction. Roots are made

up of tissues, such as xylem, phloem, and pith. In which level of

organization would the roots of a plant most likely be classified?

• A Cell

• B Organ system

• C Tissue

• D Organ

The root and shoot systems in plants work together to form a

more complex organization known as –

• A a cell.

• B an organism.

• C a tissue.

• D an organ.

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Water moves inside plants using xylem, a structure made up of a

collection of cells that form the tube-like xylem. Xylem is classified as

• A a tissue.

• B an organ.

• C an organ system.

• D an organism.

Which of the following best describes the relationship between

cells and living things in general?

(cell theory)

• A The larger the living thing, the larger its cells.

• B All living things are made up of one or more cells.

• C The number of cells in all living things is the same.

• D There is one kind of cell of which all living things are

  made.

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A new species of living thing is discovered. The cell theory states

that which of the following must be true about this new living

thing?

• A It must be made up of one or more cells.

• B Its cells must be able to make their own food.

• C All its cells must perform the same function.

• D Some of its cells must include a cell wall.

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Which statement about the cell theory is correct?

• A New cells form from old cells that have died.

• B Cell organelles are the smallest units of life.

• C All cells have the same internal structures.

• D All living things are made up of cells.

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