What is homeostasis?

• keeping balance

• breaking down substances for energy

• creating more cells

• growing and developing

Tags

NGSS.HS-LS1-2

NGSS.HS-LS1-3

Which organelle helps maintain homeostasis?

• endoplasmic reticulum

• nucleus

• cell membrane

• mitochondria

Tags

NGSS.MS-LS1-2

Which cells have a cell membrane?

• plant cells only

• animal cells only

• bacteria only

• all cells

What does "semi-permeable" mean?

• allows nothing through

• does not block things out

• allows only some things in

• cannot be passed through

Cell walls are _______, while cell membranes are _______.

• rigid, flexible

• flexible, rigid

• semi-permeable, solid

• rigid, rigid

Which cells do not have cell walls?

• plants

• fungi

• animals

• bacteria

What is a pathogen?

• a type of virus

• harmful organisms

• something that helps with hydration

• a type of blood cell

What is osmosis?

• diffusion from high to low concentration

• diffusion from low to high concentration

• diffusion between even concentrations

• a barrier to stop diffusion

Plasmodesmata are...

• organelles found in plants

• harmful bacteria

• organic molecules found in cell walls

• little openings in cell walls that allow for nutrient flow

What is diffusion?

• when a cell takes in water

• the movement of molecules in and out of a cell

• the way cell walls interconnect

• the way cell membranes stretch and change shape