plant hormones - biology

last minute biology flashcards

give four variables that must be controlled when investigatin the effect of light direction on the growth of newly germinated seedlings

• type of seeds

• volume of water seedlings receive

• light intensity

• temperature seedlings are kept at

what is the natural role of gibberellins in seeds?

stimulate seed germination

why is ethene sometimes added to fruit while it’s being transported to shops?

to speed up the ripening process

give three commercial uses of auxins

• weedkillers

• rooting powders

• promoting growth in tissue culture

give three commercial uses of gibberellins

• end seed dormancy + force seeds to germinate earlier than normal

• encourage plants to flower

• make fruit grow larger

give one commercial use of ethene

• triggers/speeds up ripening of fruit before they are sold (in the UK)