Required Practical: Plant Growth (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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Practise the cards
13 cards from this deck
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Practise the cards
13 cards from this deck
Aim of seedling growth practical
Aim of seedling growth practical
Investigate effect of light or gravity on growth of newly germinated seedlings
Control variables in plant growth practical
Control variables in plant growth practical
Same temperature and same amount of water
Observation period for seedlings
Observation period for seedlings
Daily for a week
Light experiment - well-lit group placement
Light experiment - well-lit group placement
Well-lit area (e.g., under a lamp)
Light experiment - dark group placement
Light experiment - dark group placement
Dark box or lightproof enclosure
Gravity experiment - Petri dish position
Gravity experiment - Petri dish position
Vertical position (so seedlings grow horizontally)
Seedling growth direction in light
Seedling growth direction in light
Towards light source (positive phototropism)
Seedling appearance in darkness
Seedling appearance in darkness
Taller and more spindly
Root growth direction (gravity response)
Root growth direction (gravity response)
Downwards (positive gravitropism)
Shoot growth direction (gravity response)
Shoot growth direction (gravity response)
Upwards, away from gravity (negative gravitropism)
Where auxins accumulate in phototropism
Where auxins accumulate in phototropism
Shaded side
Auxin effect on roots in gravitropism
Auxin effect on roots in gravitropism
Accumulate on lower side, inhibit growth (bend down)
Auxin effect on shoots in gravitropism
Auxin effect on shoots in gravitropism
Accumulate on lower side, promote growth (bend up)