Mystery life process
This life process is when an organism changes position.
Movement
A person sweating is showing respiration.
false—it's Excretion
A virus reproduces only inside a host cell. Is it definitely living according to MRS GREN?
Yes
Why do runners breathe faster during a race?
to increase respiration and release more energy
A kangaroo jumping across Australia.
Movement
This life process releases energy from food.
Respiration
Plants do not respire because they do not have lungs.
false—plants respire too
A crystal grows larger over time. Does this prove it is living?
No
Why does a plant need nutrients as well as sunlight?
for growth and life processes
Roots absorbing water and minerals.
Nutrition
A tree cannot walk. Give evidence that it still shows movement.
growing roots/shoots or turning leaves toward light
Movement only means moving from one place to another.
false—internal movement counts too
A robot can move and respond to commands. Is it living?
No
How is pulling away from a pin different from running a race?
Sensitivity vs Movement
A plant producing seeds.
Reproduction
A baby drinks milk. Which TWO life processes are involved?
Nutrition and Growth
All living things reproduce.
Yes
Give TWO MRS GREN characteristics that a dead tree no longer performs.
any two
A scientist discovers an organism that grows, feeds, respires, and excretes waste but never produces offspring. Is it living?
Yes, it can still be living even if reproduction is not observed.
A plant grows taller, absorbs minerals, reacts to light, produces seeds, releases waste, respires, and moves toward the light. What does this prove?
It is a living organism.
A seed appears inactive. Name THREE MRS GREN processes it can carry out when conditions are suitable.
Growth, Respiration, and Sensitivity
Fire is alive because it grows and spreads.
false—it does not carry out all MRS GREN
Name one characteristic that distinguishes a living rabbit from a toy rabbit.
Any one
Why is MRS GREN useful but not a perfect definition of life?
because some things (e.g., viruses) do not fit neatly into all seven categories.
Name all seven letters in MRS GREN.
Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition