A kelp grows about 45 cm a day in the summer.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A kelp grows about cm a day in the summer.
- How many days does it take to grow m?
- Kelps belong to which class, and what holds them to the rock?
Need a reminder? The key ideaShow
Chlorophyceae: chlorophyll a and b, starch in pyrenoids, cellulose wall, 2 to 8 equal flagella at the tip. Phaeophyceae: chlorophyll a and c with fucoxanthin, laminarin or mannitol, algin, 2 unequal lateral flagella. Rhodophyceae: chlorophyll a and d with r-phycoerythrin, floridean starch, no flagella, oogamous. Red light is absorbed near the surface; blue-green light goes deeper.
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.
Step 1. Days. , and days.
Step 2. The class. Kelps are brown algae, Phaeophyceae. A holdfast holds them to the rock.
Answer: days; Phaeophyceae, held by a holdfast.
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