LAB SAFETY
What should you wear to protect your eyes during a lab?
Safety goggles
What are all living things made of?
Cells
A bacterium is made of a cell and can reproduce on its own. Is it living or nonliving?
Living
What are all living things made of? (smallest unit of life)
Cells
What is the smallest level of biological organization?
Cell
What should you never do with chemicals in the lab?
Taste
What characteristic of life describes an organism producing offspring?
Reproduction
A candle flame grows larger, uses energy, and can spread. What key characteristic prevents it from being classified as living?
No cells
What characteristic describes an organism detecting and reacting to its surroundings?
Response
Multiple populations living and interacting in the same area form what?
Community
What should you use if a chemical gets in your eyes?
Eyewash
A plant bending toward sunlight demonstrates what characteristic of life?
Response
A crystal increases in size as more particles attach to it. Why is this not considered biological growth?
No cells
An organism made of many specialized cells is called what?
Multicellular
A population of bacteria becomes resistant to an antibiotic over many generations. What process helps explain this change?
Evolution
Why should long hair be tied back during a lab?
Prevent accidents
A person sweats when their body gets too hot. What characteristic of life is this?
Homeostasis
A virus can evolve and reproduce only inside a host cell. Why do some scientists consider viruses to be on the boundary between living and nonliving?
Dependent reproduction
What molecule contains the genetic instructions for living organisms?
DNA
A person eats a meal, breaks down the food, and uses the molecules to build new cells. What two characteristics of life are most directly involved?
Energy, growth
When heating a test tube, you should point it away from yourself and _____.
Others
A bear eats food, breaks it down, and uses the released energy to survive. Which characteristic of life is demonstrated?
Energy use/metabolism
An artificial system can grow, respond to stimuli, use energy, and maintain internal conditions, but it is not made of cells. Based on the characteristics of life, what is the strongest reason to classify it as nonliving?
No cellular structure
What level of organization includes multiple organs working together for a major function?
Organ system
Which structure controls what enters and leaves a cell?
Cell membrane