Molecules
What do hydrogen and oxygen form?
Water (H₂O)
What is the definition of a cell?
The basic unit of life.
What system moves blood throughout the body?
Circulatory system.
What is a key difference between plant and animal cells?
Plant cells have a cell wall and chloroplasts.
Are viruses living or nonliving?
Nonliving
What are molecules made of?
Atoms
What is the smallest unit of life?
A cell.
What system helps us breathe?
Respiratory system.
Why are chloroplasts only found in plants?
They are needed for photosynthesis.
What does every virus have?
RNA or DNA
How do different molecules form?
Atoms combine in various ways.
What do all living things have?
Cells
What does the immune system do?
It fights off germs to keep us healthy.
What organelle produces energy in cells?
Mitochondria.
What happens at the end of a virus attaching to a cell?
cell breaks open, releasing virus particles
What is a property of sodium chloride (NaCl)?
forms a crystalline structure
What is the role of the cell membrane?
It controls what enters and leaves the cell.
How do the respiratory and circulatory systems work together?
The respiratory system brings in oxygen while the circulatory system transports it to cells.
Compare mitochondria and chloroplasts
Mitochondria break down food for energy; chloroplasts convert sunlight into food.
Describe a eukaryotic cell?
contains a nucleus and membrane bound organelle
What is the relationship between atoms and molecules?
Molecules are made up of two or more atoms.
How do organelles function together?
Each organelle performs a unique function that contributes to the cell's overall health.
What happens if the immune system fails?
The body becomes susceptible to infections and diseases.
What would happen if an animal cell had a cell wall?
It would restrict movement and function, possibly harming the cell.
Bacteria are always Harmful?
False