Modified shoots and leaves
Answers are for parents and teachers.
1
Draw a bulb, a tuber and a rhizome and give 2 examples of each.
Bulb: onion, tulip; tuber: potato, Jerusalem artichoke; rhizome: Johnson grass, mint.
2
Do a small experiment with potato or onion and describe the result in 3β4 sentences.
Iodine turns potato blue; an onion in water grows roots and shoots.
3
Table: modified organ β plant β job (at least 8 rows).
Storage root β carrot β reserve; prop root β maize β support; bulb β onion β reserve; tuber β potato β reserve; rhizome β Johnson grass β spread; tendril β cucumber β clinging; spine β cactus β defence; runner β strawberry β spread.
4
If each potato tuber has 5 eyes and each gives one shoot, how many shoots come from 4 tubers?
20
5
Why does a potato turn green and become poisonous if kept in light? Explain; never eat green potatoes.
In light chlorophyll and toxic solanine build up; so tubers should be stored in a dark, cool place.