Modified roots and the shoot
Answers are for parents and teachers.
1
Give 2 examples each of storage, prop and aerial roots and state each one’s job.
Storage: carrot, radish — reserve; prop: maize, sorghum — support; aerial: banyan, orchids — support/air absorption.
2
Draw a twig and mark node, internode, terminal bud and lateral bud.
The terminal bud is at the tip; lateral buds are in leaf axils (at nodes).
3
If a twig has 6 nodes in a row, how many internodes are between them?
5
4
Why can’t seed be taken from a biennial plant in its first year? Write 2–3 sentences.
In the first year it only makes vegetative organs and stores food; flowering and fruiting come in the second year.
5
Why does the colour of a tree’s one-year shoot change in autumn? State the reason.
A cork layer forms as the surface thickens, so green turns brown-reddish.