Homework & Study Guide # 9 Seaweed and Primary Producers

Vocabulary:

primary production cellulose zooxanthellae blade stipe holdfast pneumatocysts chlorophyll algin accessory pigments carrageenan agar corallines kelp diploid haploid gametophyte sporophyte blue-green algae foraminifera flagellates radiolarians ciliates amoebas bloom

1. Describe the three types of seaweeds.

2. Diagram the life history of Macrocystis. Label every step by name and ploidy. (see you text for help: note the reminder that for kelps the sporophyte is larger than the gametophyte)

3. What is the life cycle of diatoms?

4. What environmental factors are important to kelp forests?

5. What skeletal materials are found in what kinds of microalgae?

6. What roles do dinoflagellates play in marine systems?