Cell Size Lesson

One of your friends puts a piece of onion under a microscope and tells you they think the onion is NOT a living thing. Using what you've learning during lesson one evidence from the microscope image, what evidence can you use to help your friend understand that onions are living by using what you learned in class. Choose the 2 correct responses below.

• The microscope shows that the onion is made of cells

• Onions grow and develop over time

• The onion is eating

Tags

NGSS.MS-LS1-1

Amoebas and paramecium are unicellular because they are made of

• Many cells

• One cell

Tags

NGSS.MS-LS1-1

When using a microscope you need to know the difference between magnification, ​ (a)   ,and resolution, ​ (b)   .

• making an object look larger

• making an object look clearer

• adding color to an object

What is the typical size range of a eukaryotic cell?

• 1-10 micrometers

• 10-100 micrometers

• 100-1000 micrometers

• 1000-10000 micrometers

Which of the following is a reason why cells are small?

• To maximize surface area to volume ratio

• To minimize energy consumption

• To increase genetic material

• To enhance visibility under a microscope

What tool is commonly used to measure cell size?

• Thermometer

• Microscope

• Barometer

• Spectrometer

How does cell size affect the rate of diffusion?

• Larger cells have faster diffusion rates

• Smaller cells have faster diffusion rates

• Cell size does not affect diffusion

• Diffusion rate is the same for all cell sizes

Which of the following is a consequence of a cell being too large?

• Efficient nutrient absorption

• Increased metabolic rate

• Difficulty in waste removal

• Enhanced DNA replication

What is the approximate size of a bacterial cell?

• 0.1-1 micrometer

• 1-10 micrometers

• 10-100 micrometers

• 100-1000 micrometers

Why do plant cells tend to be larger than animal cells?

• They contain more DNA

• They have a rigid cell wall

• They have more mitochondria

• They lack a nucleus