Life Science Review

Which characteristic is shared by all cells?

• They need energy.

• They reproduce sexually.

• They make their own food.

• They move from place to place.

What is the definition of homeostasis?

• The elimination of wastes

• The process by which energy from the sun is used to make food

• The maintenance of a stable internal environment

• The division of cells to form new cells

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What is one way stress can affect homeostasis?

• It disrupts ability to fight disease

• It increases water balance.

• It maintains constant internal temperature.

• It decreases the frequency of headaches.

What is homeostasis?

• The body's tendency to keep an internal balance

• Cell wall

• Peninsula

• Staying hydrated

A cell can be seen by looking through a microscope.

Seeing which of these organelles would let you know that you are looking at a plant cell?

• Mitochondria

• Chloroplast

• Cell membrane

• Nucleus

In biology class, Zach observes cells. Each cell has a structure that separates the inside of the cell from the environment.

Which structure is Zach observing?

• Nucleus

• Cytoskeleton

• Cell membrane

• Genetic material

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In the picture of a cell below, which label indicates the part of the cell that contains most of the cell's genetic material?

• 1

• 2

• 3

• 4

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Choose the answer the places the levels of organization in the correct order from lowest to highest level

• tissue, organ, molecule, atom, organism, organ system, cell

• organ, organ system, tissue, cell, molecule, atom, organism

• atom, molecule, cell, tissue, organ, organ system, organism

• organism, atom, molecule, organ, organ system, cell, tissue

• organism, organ system, organ, tissue, cell, molecule, atom

The cell theory includes the following statements: Cells are the basic unit of life and:

• All cells come from preexisting cells and all organisms are composed of cells

• All organisms are composed of cells and all cells have the same components (parts)

• All cells come from preexisting cells and all cells have the same components (parts)

• All organisms are composed of cells and all cells have the same shape

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What type of cell does the picture show?

• A plant cell, because it contains a cell wall and chloroplasts.

• An animal cell, because it contains lysosomes and mitochondria.

• An animal cell, because it contains a cell wall and mitochondria.

• A plant cell, because it contains cytoplasm and vacuoles.

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