Levels of Organization
Put these in order from simplest to most complex:
Organ, Cell, Organism, Tissue, Molecule, Organ System, Atom
Atom → Molecule → Cell → Tissue → Organ → Organ System → Organism
True or False: All living things are made of one or more cells.
True
What does homeostasis mean?
Maintaining stable/internal conditions in a cell or organism
Which structure controls what enters and leaves the cell?
Cell membrane
A scientist sees a group of similar cells working together to perform a specific job. What level of organization is being observed?
Tissue
What level of organization is made of similar cells working together to perform a specific function?
Tissue
What is the basic unit of structure and function in all living things?
The cell
A cell removes waste that has built up inside it. How does this help the cell?
It helps maintain homeostasis and allows the cell to function properly
Which structure contains the cell's DNA and helps control cell activities?
Nucleus
A cell has a nucleus, mitochondria, and a cell membrane. What is the cell membrane's main job?
It controls what enters and leaves the cell.
The heart is an example of which level of organization?
A. Cell
B. Tissue
C. Organ
D. Organ system
C. Organ
A scientist observes that a new cell formed when an existing cell divided. Which part of cell theory does this support?
All cells come from pre-existing cells.
A cell isn't getting enough energy. What problem could occur?
The cell may not be able to carry out its normal life processes!
Which organelle releases usable energy from food?
Mitochondria
A student says, "The mitochondria make food for the cell." Is the student correct? Explain.
No. Chloroplasts make food in plant cells. Mitochondria release usable energy from food.
Which is more complex: an organ or an organ system? Explain why.
An organ system is more complex because it is made of multiple organs working together.
A single-celled organism can obtain food, get rid of waste, and reproduce. What does this show about cells?
Cells are the basic unit of life / cells carry out life processes.
Water is entering and leaving a cell. Why is controlling this important?
It helps the cell maintain a proper balance of water.
Which structure provides support and helps maintain the shape of a plant cell?
Cell Wall
🚨 CELL EMERGENCY!
A cell has plenty of food, but it cannot release enough usable energy from that food.
Which organelle might not be functioning properly?
Mitochondria
A group of organs works together to digest food and absorb nutrients. What level of organization is this?
Organ system
Which statement is NOT part of cell theory?
A. All living things are made of cells.
B. Cells are the basic unit of life.
C. All cells come from pre-existing cells.
D. All cells have a nucleus.
D. All cells have a nucleus.
Waste is building up inside a cell.
What should the cell do, and which structures help?
The cell needs to store/remove the waste. The vacuole can store waste, and the cell membrane controls what leaves the cell.
A plant cell is placed in sunlight. Which organelle uses the light energy to help make food?
Chloroplasts
A plant cell is struggling because:
Name the structures that could help with each problem.