Topic 6: Inheritance, Variation and Evolution pt1 Flashcards
(9 cards)
What are plants sensitive too?
light
gravity
temperature
water
physical touch
What is a tropism
A directed growth response
What is positive phototropism
towards light
What is positive geotropism
towards gravity
What is positive hydrotropism
towards water
What is positive thigmotropism
towards touch
Where is auxin produced
At the base of the tip of the plant
What happens when light is shone directly above a plant?
Because the light is coming from straight above, there is even distribution of auxin on both sides of the shoot, causing equal growth and elongation on both sides, so the plant grows upwards