Investigating plant responses (AQA GCSE Biology): Flashcards
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Practise the cards
15 cards from this deck
What does the light intensity investigation study?
What does the light intensity investigation study?
How light intensity affects growth of newly germinated seedlings
How many Petri dishes are used in the light experiment?
How many Petri dishes are used in the light experiment?
Three
What does germinate mean?
What does germinate mean?
Seeds start growing
What are the three light conditions tested?
What are the three light conditions tested?
Bright windowsill, dark cupboard, dim light
How often are seedlings measured?
How often are seedlings measured?
Every day for at least one week
What to calculate from daily measurements
What to calculate from daily measurements
Mean height of seedlings in each dish
X-axis of seedling growth graph
X-axis of seedling growth graph
Day
Y-axis of seedling growth graph
Y-axis of seedling growth graph
Mean height
Definition of gravitropism
Definition of gravitropism
Plant response to gravity
Direction roots grow in response to gravity
Direction roots grow in response to gravity
Downwards (towards gravity)
Direction shoots grow in response to gravity
Direction shoots grow in response to gravity
Upwards (away from gravity)
Definition of phototropism
Definition of phototropism
Plants grow towards light sources
Why plants respond to light
Why plants respond to light
To get light for photosynthesis
Why use several seedlings per condition
Why use several seedlings per condition
Makes results more reliable
Control variables in light intensity experiment
Control variables in light intensity experiment
Temperature and water