Cell theory was first proposed in 1838. Evidence obtained through additional scientific investigations resulted in the current cell theory. Which statement describes a component of the original cell theory that was removed because of the new scientific knowledge?

•  All living things are made of cells
• All cells come from other preexisting cells
•  Cells form through spontaneous generation.
• Cells are the basic structural and functional units of life

Identify this structure.

• cell wall
• cell membrane
• sap vacuole
• cytoplasm

Tags

NGSS.MS-LS1-2

Which  structures are present in animal and plant cells?

• Vacuole, nucleus and cell membrane
• Nucleus, cell wall, cytoplasm
• Nucleus, cell membrane, cytoplasm
• Cell membrane, chloroplast, cell wall

Tags

NGSS.MS-LS1-2

Joy took the notes shown below while learning about cells.
• Forms boundary between a cell and the outside environment
• Controls the movement of materials into and out of the cell
• Consists of double layer of phospholipids

• endoplasmic reticulum
• cell membrane
• cell wall
• nucleus

Tags

NGSS.MS-LS1-2

Which of these best completes this concept map?

• an animal cell
• a prokaryotic cell
• a plant cell
• a bacteria

Tags

NGSS.MS-LS1-2

Muscle cells are responsible for obtaining energy so the body can performvoluntary and involuntary movement. Using you knowledge aboutorganelles and muscles, how would a muscle cell differ from other types ofanimal cells?

• The muscle cell would have larger centrioles than the other types of animal cells.
• The muscle cell would have more mitochondria than the other types of animal cells.
• The muscle cell would have a larger golgi apparatus than other types of animal cells.
• none of these

Tags

NGSS.MS-LS1-2

Which cell structure is correctly paired with its primary function?

• ribosome - movement
• mitocondrion - energy production
• vacuole - cell division
• nucleus - storage of nutrients

Tags

NGSS.MS-LS1-2

Using a microscope in the science lab, Jill observed two unknown cells: Cell 1 and Cell 2. Cell 1 she identified as a plant cell and Cell 2 as an animal cell. Her teacher told her she identified the cells correctly. What did Jill most likely observe to correctly identify the cells?

• Cell 2 had a cell membrane and Cell 1 did not.
• Cell 1 had a cell wall and Cell 2 did not.
• Cell 2 had a chloroplast and Cell 1 did not.
• Cell 1 had a nucleus and Cell 2 did not.

The information responsible for determining eye color is found in 

• Genes, chromosomes, and nucleus.
• chromosomes, chloroplasts and vacuoles.
• cytoplasm, chloroplast and genes
• golgi body

Tags

NGSS.MS-LS1-5

NGSS.MS-LS3-1

NGSS.MS-LS3-2

Acts like a gatekeeper- allowing some materials to pass through it, but not others. 

• cytoplasm
• cell membrane
• mitochondria
• vacuoles