B17/18Ecology Flashcards
What are two factors that species depend on each other for
Food, seed dispersal,shelter pollination
What is phototropism?
Is when a plant moves towards light
What is geotrpism
A plants response to gravity
What is hydrotrpism
A plants response to water
What are auxins
Auxins are hormones that control the growth of plants by promoting cell division. This allows the plant to elongate and bend towards light, water
How does phototropism happen?
Auxin molecules congregate to the shaded side of the shoot and promote cell elongation. Since the side farthest away from the sun grows faster the shoot bends towards the sun
How does geotrpism occur
In roots auxins SUPRESS cell elongation and concentrate on the lower side of the root allowing it to bend downwards
What gas is released during anaerobic decomposition
Methane