Cells & Organelles
What organelle controls the cell?
Nucleus
What is diffusion?
Movement of particles from high to low concentration.
What type of tissue sends signals through the body?
Nervous Tissue
What structure do only plant cells have that provides strength?
cell wall
What is a unicellular organism?
An organism made of one cell.
What organelle makes energy for the cell?
Mitochondria
What is osmosis?
Diffusion of water across a semipermeable membrane.
What tissue helps movement by contracting?
Muscle Tissue
What organelle allows plants to make food using sunlight?
Chloroplasts
What is a multicellular organism?
An organism made of many specialized cells.
What organelle makes proteins for the cell?
Ribosomes
Why does water move during osmosis?
It moves to balance concentration on both sides of the membrane.
What tissue supports and connects body parts?
Connective Tissue
Why do plant cells have large vacuoles?
To store water, nutrients, and waste.
How do unicellular organisms reproduce?
By binary fission.
What organelle packages and ships materials?
Golgi Bodies
What happens if a cell is placed in very salty water?
Water leaves the cell and it shrinks.
What system moves blood and nutrients through the body?
Circulatory System
What cell part do animal cells have that plants don’t?
Centrioles
Why do multicellular organisms need tissues?
To organize specialized cells for specific functions.
What organelle controls what enters and leaves the cell?
Cell Membrane
How are diffusion and osmosis similar?
Both move substances from high to low concentration without energy.
What is a group of organs working together called?
Organ system
Name two major differences between plant and animal cells.
Plant: cell wall + chloroplasts; Animal: no cell wall, smaller vacuoles.
List one similarity and one difference between unicellular and multicellular organisms.
Similarity: Both perform life processes. Difference: One cell vs. many specialized cells.