Question 1
Which acronym helps students remember all seven criteria for life in science?No clue? Show me the answer
Correct answerCorrect!
IncorrectStep-by-step walkthrough
Choose a solution method
Method #1Direct ApproachStep 1: Identify what is being asked
The question asks for the acronym used by scientists to remember the seven criteria for life.
Step 2: Recall the acronym
Scientists use MRSGREN, where each letter stands for one criterion: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition.
Step 3: Select the correct answer
The correct acronym is MRSGREN. The other options (SCIENCE, BIOMRS, LIFEOK) do not correspond to any recognised scientific checklist for life.
Method #2Process of EliminationStep 1: Identify the question focus
We need the acronym used to remember the seven criteria for life in biology.
Step 2: Eliminate 'SCIENCE'
SCIENCE has seven letters but does not stand for the life criteria — its letters do not match Movement, Respiration, etc.
Step 3: Eliminate 'BIOMRS' and 'LIFEOK'
BIOMRS and LIFEOK are not recognised scientific acronyms for life criteria. Neither matches the seven MRSGREN criteria.
Step 4: Select the correct answer
MRSGREN is the standard biology acronym covering all seven criteria: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition.
Question 2
A sunflower slowly turns its stem and leaves to face the sun throughout the day. Which criterion for life does this BEST demonstrate?No clue? Show me the answer
Correct answerCorrect!IncorrectStep-by-step walkthrough
Choose a solution method
Method #1Direct ApproachStep 1: Identify the behaviour described
The sunflower is detecting a change in its environment (the direction of sunlight) and responding to it by turning its stem and leaves.
Step 2: Match the behaviour to a criterion
Sensitivity is the criterion that describes a living thing's ability to detect and respond to changes in its environment, called stimuli. Sunlight is the stimulus here.
Step 3: Confirm the answer
The sunflower turning towards light is a classic example of Sensitivity. Growth would involve increasing in size, Nutrition involves taking in energy, and Excretion involves removing waste.
Method #2Process of EliminationStep 1: Identify the key action
The sunflower is reacting to sunlight by changing its position. We need to match this to the correct life criterion.
Step 2: Eliminate 'Nutrition'
Nutrition relates to taking in an energy source such as food or making food via photosynthesis — not turning to face the sun.
Step 3: Eliminate 'Growth'
Growth means getting bigger or developing over time — the sunflower turning in a single day is not growth.
Step 4: Eliminate 'Excretion'
Excretion means removing waste products from internal chemical processes — completely unrelated to turning towards light.
Step 5: Select the correct answer
Sensitivity is correct — it describes detecting and responding to a stimulus (sunlight) in the environment.
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