A student studies five fruits: apple, mango, strawberry, orange and banana…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A student studies five fruits: apple, mango, strawberry, orange and banana.
- Which of them are false fruits?
- Which of them are true fruits?
- Which of them is usually seedless, and why?
Need a reminder? The key ideaShow
The ovary becomes the fruit, and its wall becomes the pericarp. A false fruit includes the thalamus. A parthenocarpic fruit forms without fertilisation. Apomixis makes seeds without fertilisation. In polyembryony, one seed has more than one embryo. A hybrid that is heterozygous for one gene gives heterozygous plants after generations of self-pollination.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. Five fruits.
Plan. Use the part of the flower that forms the fruit.
Step 1. False fruits. Apple and strawberry. The thalamus takes part in forming them.
Step 2. True fruits. Mango and orange, and banana too, since it develops from the ovary.
Step 3. The seedless fruit. The banana. It is parthenocarpic, which means that it develops without fertilisation, so no seeds form.
Answer: (a) apple, strawberry; (b) mango, orange, banana; (c) banana, because it is parthenocarpic.
Watch out. A fruit that is seedless is not always a false fruit. Banana is a true fruit.
Discussion (0)
Log in to join the discussion.
Loading…