CELL THEORY AND HOMEOSTASIS

Seth placed an unknown organism under a slide. This is what he saw. He made the following claims based on this evidence. Which of these is not part of cell theory?

• 
  All cells contain a nucleus

• 
  All cells come from other cells

• All living things are made of cells

• 
  The smallest unit of all living things is a cell

What evidence proves that all cells come from other cells?

• cell divides

• cells have nuclei

• cells move around

• cells have cell membrane

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NGSS.MS-LS1-1

One part of the cell theory states that cells come from other cells. Which reasoning below best explains that this part of the cell theory applies to all organisms?

• 
  The cells of all organisms excrete waste

• 
  The cells of all organisms have cytoplasm

• The cells of all organisms divide to make more cells

• The cells of all organisms take in nutrients from their environment

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NGSS.MS-LS1-1

Kayla summarizes cell theory to her class. She states that all organisms are made up of one or more cells. Which pair of statements correctly completes her summary?

• All cells come from existing cells, and all cells have the same parts

• All cells are the same size, and the cell is the basic unit of all organisms. 

• the cell is the basic unit of all organisms, and all cells have the same parts.

• The cell is the basic unit of all organisms, and all cells come from existing cells.

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NGSS.MS-LS1-1

Emily knows that an organism must be able to perform all of the functions necessary for life. Which of the following is an organism?

• DNA

• NUCLEUS

• CYTOPLASM

• PROKARYOTES

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NGSS.MS-LS1-1

Homeostasis is necessary for a cell to survive. What is the definition of homeostasis?

• the elimination of waste

• The division of cells to form new cells

• The maintenance of a stable internal environment

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

A cell must work to maintain a stable internal environment. It is also important for the environment around the cell to be stable. What reasoning explains what happens when the concentration of water inside the cell is lower than the concentration of water outside of the cell?

• The cell loses nutrients

• The cell splits and creates two new cells

• The cell gains too many lipids and carbohydrates

• The cell either loses water and dries up, or gains water and bursts

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NGSS.MS-LS1-2

Homeostasis is important for the cell to survive. Which one is not a function of the cell that maintains homeostasis

• Consuming Oxygen

• cellular respiration

• moving away from danger

• digesting of food

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NGSS.MS-LS1-2

Even when it is cold outside, the human body maintains an internal temperature of 37 degrees Celsius. Which term describes the maintenance of a stable internal condition, such as this?

• endocytosis

• homeostasis

• mitosis

• photosynthesis

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NGSS.HS-LS1-3

If the environment becomes colder, the human body responds by shivering. This response maintains homeostasis by ______

• lowering body temperature

• Getting frostbite

• increasing body temperature

• Keeping muscles moving, thus keeping them from getting too stiff