A flower has 8 stamens. The anther of each stamen is of the usual kind, with two lobes and two…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A flower has stamens. The anther of each stamen is of the usual kind, with two lobes and two microsporangia in each lobe.
- How many microsporangia are in one anther?
- How many microsporangia are in the whole flower?
- How many anther lobes are in the whole flower?
Need a reminder? The key ideaShow
A flower has four whorls: calyx, corolla, androecium and gynoecium. A stamen has a filament and an anther. A typical anther is bilobed, with two microsporangia in each lobe, so it has four. The wall of a microsporangium has four layers: epidermis, endothecium, middle layers and tapetum. The sporogenous tissue lies in the centre.
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. stamens. Each anther has lobes, and each lobe has microsporangia.
Plan. Count in one anther, then multiply by the number of stamens.
Step 1. One anther. microsporangia.
Step 2. The flower. microsporangia.
Step 3. The lobes. lobes.
Answer: ; ; .
Check. Each lobe holds two sacs, so lobes hold sacs.
Watch out. A typical anther has four microsporangia, not two.
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