Lesson 1 ·Class 9 · Seeds — Structure and Germination · Sort Lab
Fruit, Seed and Grain
Three words people use loosely.
Sort each statement into what it actually describes.
Sorted 0/7
All items sorted — check each bin.
Free play — sort every item into the bin it belongs in; each correct drop tells you why. Switch to when you're ready to test yourself.
Ovary → fruit, ovule → seed. A grain is both at once because the two walls have fused.
What this lesson covers
Challenges to clear
- Fill the Grain bin correctly.
- Sort every statement.
- Fill the Fruit box — the ripened ovary, whatever it looks like.
The task
Sort each statement into what it actually describes.
What this lesson covers
- Fruit — From the ovary: Develops from the ovary wall (The ovary becomes the pericarp.); Its wall is the pericarp (Which may be fleshy, as in mango, or dry, as in a pod.)
- Seed — From the ovule: Develops from a fertilised ovule (One ovule gives one seed.); Contains an embryo with a radicle and plumule (The next generation, packed with a food store.); Its coat is the testa (Formed from the integuments of the ovule.)
- Grain — Fruit and seed fused: Fruit wall and seed coat are fused and cannot be separated (This is what defines a caryopsis.); Wheat, maize and rice are examples (We call them seeds in everyday speech, but botanically they are one-seeded fruits.)
Hint
Ovary → fruit, ovule → seed. A grain is both at once because the two walls have fused.