Cell Structures
What controls all cell activities?
The nucleus.
What direction does diffusion move?
High to low concentration.
What do ecologists study?
Organisms and their environment.
Where is DNA found?
In the nucleus.
Claim
Diffusion and osmosis are important processes that help maintain balance inside cells.
Which organelle makes proteins?
Ribosomes.
What moves in osmosis?
Water.
What is the Earth's life-supporting layer called?
The biosphere.
What holds genetic information?
DNA.
What type of cell has no nucleus?
Prokaryotic.
What is the solute in salt water?
Salt.
What type of relationship helps both species?
Mutualism.
What stage comes before mitosis?
Interphase.
Evidence
When a cell is placed in pure water, water moves into the cell through osmosis, causing it to swell. In salty water, water leaves the cell and it shrinks. This shows osmosis balances water based on the surrounding concentration.
What do plant cells have that animal cells don’t?
Cell wall and chloroplasts.
What is it called when molecules are balanced?
Equilibrium.
What’s it called when one animal eats another?
Predation.
What divides during cytokinesis?
The cell.
What is the jelly-like substance in cells?
Cytoplasm.
What helps cells stay balanced?
Homeostasis.
What is the variety of life in an area called?
Biodiversity.
What is DNA called when it’s loose?
Chromatin.
Reasoning
Cells constantly interact with their environment, and osmosis allows water to move in or out depending on the cell’s needs. This helps maintain homeostasis, or internal balance, which is crucial for cell survival. Without osmosis and diffusion, cells could not regulate their contents or get rid of waste efficiently, which could lead to damage or death.