Life & Cells
What is a cell?
The basic unit of life that makes up all living organisms.
What is the nucleus?
The control center of the eukaryotic cell that houses the DNA.
What is the digestive system?
Organ system responsible for breaking down food and absorbing nutrients into the body.
What is a hypothesis?
A testable prediction or educated guess about the outcome of an experiment.
What are prokaryotic cells?
Cells that lack a membrane-bound nucleus and organelles (e.g., bacteria).
What is metabolism?
The chemical process by which an organism breaks down materials to build energy and sustain life.
What is the mitochondrion (mitochondria)?
Often called the "powerhouse of the cell," this organelle generates most of the cell's ATP energy.
What is the skeletal system?
System that provides structure, protects internal organs, and produces blood cells.
What is the independent variable?
The variable in an experiment that is intentionally changed or manipulated by the scientist.
What are eukaryotic cells?
Complex cells containing a distinct nucleus and membrane-bound organelles.
What is homeostasis?
The state of steady internal, physical, and chemical conditions maintained by living systems.
What are ribosomes?
Small structures responsible for assembling and synthesizing proteins.
What is the cardiovascular (circulatory) system?
System consisting of the heart, blood, and blood vessels that transports oxygen and nutrients.
What is qualitative data?
Information or observations that describe qualities or characteristics rather than numerical values.
What is a chloroplast?
Organelle present in plant cells that contains chlorophyll to perform photosynthesis.
Who is Robert Hooke?
Scientist who first observed and named cells while looking at cork under a microscope.
What is the cell wall?
Plant cell structure that provides rigid support and protection outside the cell membrane.
What is the integumentary system?
System that includes skin, hair, and nails to protect the body from external damage.
What is the dependent variable?
The variable being measured or observed to see the effect of the independent variable.
What is a nucleoid?
Unbound, irregular region in prokaryotic cells where the genetic material is located.
What is photosynthesis?
The process plants use to convert sunlight, water, and carbon dioxide into glucose and oxygen.
What is a lysosome?
Organelle containing digestive enzymes to break down waste materials and cellular debris.
What is epithelial tissue?
Tissue type that lines the surfaces and cavities of organs throughout the body.
What is the control group?
The group in an experiment that does not receive the special treatment and serves as a comparison benchmark.
What is a large central vacuole?
What is a large central vacuole?