Cell Function
I am the control center of the cell. I contain DNA.
Nucleus
Similar cells working together form a _____.
Tissue
What something does.
FUNCTION
Your body has muscle cells and nerve cells. Are they the same type of cell? Why might your body need different types?
No. Different cells have different structures and jobs.
A scientist sees a group of similar cells working together. What level should the scientist record?
Tissue
Which organelle is associated with releasing usable energy from food?
Mitochondria
Which is the smallest level that is considered living?
Cell
What something is made of or what it looks like.
STRUCTURE
Nervous system — Circulatory system — Brain — Respiratory system
Which doesn't belong?
Brain — it is an organ; the others are organ systems.
A scientist discovers a structure made of several tissues that performs a specific job. What level is it?
Organ
What is the function of chloroplasts?
Help plants use sunlight to make food
“Several different tissues work together to form the heart.”
Organ
All living things are made of cells.
Cell Theory
A scientist finds something made of many similar cells working together to perform a job. What level is it?
Tissue
Scientists discover several organs working together to move oxygen around an animal's body. What level are they studying?
Organ system
Which structure is found in plant cells but not animal cells?
Cell wall and Chloroplast
"What happened each time we moved to the next level?"
The smaller structures combined or worked together to create something more complex
I am the basic unit of life. What am I?
Cell
Cell — Tissue — Organ — Atom
Which level in the hierarchy is out of place?
Atom
A student says, “A cell is bigger than a tissue because a cell is alive.” What's wrong with this reasoning?
A tissue is made of many cells working together, so it is generally a higher level of organization.
Explain one similarity and one difference between plant and animal cells.
Both plant and animal cells have a cell membrane. Plant cells have a cell wall and chloroplasts, while animal cells do not.
Put the levels of organization in order from largest to smallest.
Organism, Organ System, Organ, Tissue, Cell, Molecule, Atom
A human is made of many organ systems working together. Which vocabulary word describes the entire human?
Organism
Why can scientific explanations about living things change?
Scientific explanations can change when scientists discover new evidence, technology, findings, or information.
Scientists remove one organ from an organism and notice that several other organs are affected. What does this demonstrate about organ systems?
Organs are interconnected and work together; changing one organ can affect the function of the system and organism.