Cell City
A tiny organism has only ONE cell, but it can still grow, get energy, and reproduce. Is it living?
A. No — living things need many cells
B. No — cells cannot live alone
C. Yes — a single cell can carry out life functions
D. Only if it has organs
C — Yes, a single cell can carry out life functions.
A group of similar cells working together is called a:
A. Cell
B. Organ
C. Tissue
D. Organ system
C — Tissue
The heart is an example of a:
A. Cell
B. Tissue
C. Organ
D. Organ system
C — Organ
Which organ system helps the body take in oxygen?
A. Digestive
B. Nervous
C. Respiratory
D. Skeletal
C — Respiratory system
What does function mean in science?
A. The way something is built
B. What something does
C. The size of something
D. The color of something
B — What something does.
An organism made of only one cell is called what?
A. Multicellular
B. Unicellular
C. Tissue-level
D. Organ-level
B — Unicellular
A tissue is like a strong friend group. What makes that comparison work?
A. They are all the same age
B. They work together toward a specific job
C. They always look identical
D. They never need each other
B — They work together toward a specific job.
What is the major job of the heart?
A. Digest food
B. Take in oxygen
C. Pump blood
D. Make bones
C — Pump blood
Which organ system transports oxygen and nutrients throughout the body?
A. Respiratory
B. Circulatory
C. Digestive
D. Skeletal
B — Circulatory system
What does structure mean in science?
A. What something does
B. The way something is built or organized
C. How fast something moves
D. How old something is
B — The way something is built or organized.
The Cell Boss says: “I need ONE cell to digest food, pump blood, think, and move the whole body!” What would the cell say?
A. “Easy!”
B. “I only need a tissue.”
C. “I need specialized cells to help!”
D. “I can become an organ by myself.”
C — “I need specialized cells to help!”
A group of muscle cells working together to help the body move is what level of organization?
A. Cell
B. Tissue
C. Organ
D. Organ system
B — Tissue
Why is the heart an organ instead of a tissue?
A. It is bigger than a tissue
B. It has blood inside it
C. Different tissues work together to perform its function
D. It is part of a cell
C — Different tissues work together to perform its function.
You are running, and your breathing and heart rate both increase. Which two systems are working together to get oxygen where it needs to go?
A. Digestive + Skeletal
B. Nervous + Digestive
C. Respiratory + Circulatory
D. Skeletal + Muscular only
C — Respiratory + Circulatory
A turtle has specialized structures that allow it to absorb oxygen underwater. What does this show about structure and function?
A. Structures are adapted to help the turtle perform gas exchange
B. Structures are only for movement
C. Structures have nothing to do with function
D. Structures always have the same function
A — Structures are adapted to help the turtle perform gas exchange.
Why do multicellular organisms need different types of cells?
A. Different cells make the organism colorful
B. Different cells perform different functions
C. Every cell has a different size
D. Cells do not work together
B — Different cells perform different functions.
Scientists find a group of cells working together for one function. What can they conclude?
A. It must be an organ system
B. It must be one cell
C. It is likely a tissue
C — It is likely a tissue.
The stomach says, “I’m tired of doing all this work!” What is one of its major jobs?
A. Pumping blood
B. Helping break down food
C. Taking in oxygen
D. Sending nerve signals only
B — Helping break down food
The Respiratory System says, “I’m taking a vacation!” What would the body have trouble getting?
A. Water
B. Food
C. Oxygen
D. Bones
C — Oxygen
A turtle’s skin can absorb oxygen underwater. What does this tell scientists?
A. Skin has a specialized function that helps the turtle obtain oxygen
B. Skin is only for protection
C. Skin is part of the skeletal system
D. Skin produces oxygen
A — Skin has a specialized function that helps the turtle obtain oxygen.
An organism has many cell types, and each type has a different job. What does this demonstrate?
A. All cells do the same job
B. Cells can be specialized for different functions
C. Cells cannot work together
D. Only plants have cells
B — Cells can be specialized for different functions.
Why are tissues important in multicellular organisms?
A. They make cells work separately
B. They allow groups of specialized cells to work together
C. They replace all organs
D. They prevent cells from communicating
B — They allow groups of specialized cells to work together.
Which sequence shows how an organ is formed?
A. Organ → Tissue → Cell
B. Cells → Tissues → Organ
C. Tissue → Cell → Organ
D. Organ system → Organ → Cell
B — Cells → Tissues → Organ
Why do organ systems need to work together?
A. Every system does exactly the same job
B. Different systems perform different jobs that work together to keep the organism alive
C. Organ systems never interact
D. Only one system is needed at a time
B — Different systems perform different jobs that work together to keep the organism alive.
A turtle can absorb oxygen through structures including its skin, mouth/nose, and cloaca while underwater. What does this evidence demonstrate?
A. Every structure has the same function
B. Turtles do not need oxygen
C. Different structures can have specialized functions that help an organism survive
D. The skeletal system produces oxygen
C — Different structures can have specialized functions that help an organism survive.