In a warm bay, the red dinoflagellate Gonyaulax has 300 cells per mL on day 0…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
In a warm bay, the red dinoflagellate Gonyaulax has cells per mL on day . Each cell divides once every days, and all the cells live. How many divisions happen in days, and how many cells per mL are there then? Why can this harm the fish of the bay?
Need a reminder? The key ideaShow
Kingdom Protista holds the single-celled eukaryotes. Chrysophytes (diatoms) have walls of silica in two shells and form diatomaceous earth. Dinoflagellates have cellulose plates and two flagella; red ones such as Gonyaulax cause red tides. Euglenoids have a protein pellicle, no wall, and make food in light but eat in the dark. Slime moulds are saprophytes that form a plasmodium and spores.
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. Divisions. divisions.
Step 2. Cells. cells per mL.
Step 3. The harm. So many red cells colour the sea red, a red tide. They release toxins that can kill fish and other marine animals.
Answer: divisions and cells per mL; the toxins of the red tide kill fish.
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