Which groups of algae produce the following important products: (1) agar, (2) algin, (3) nerve poisons, (4) abrasives for polishes?

Describe the morphological and ecological attributes of the red algae? How do they compare to dinoflagellates, diatoms, and brown algae? Are red algae found in Pennsylvania? How are they important to humans? And are they edible?

What is mode of nutrition of red algae?

Give some characteristic of brown algae.

Why is algae important for dietary purposes?

What is the difference between primary algae and secondary algae?  Six major groups of algae? How are these groups classified into these groups, and what is unique about each group?   What is the difference between diatoms and coccoliths found in algae.  What is the difference between foraminiferans and radiolarians found in protozoa?  What characteristics differentiate the protozoan groups (foraminiferans and radiolarians) from the algal groups (diatoms and coccoliths) microscopicly? Of what economic and academic value are algae?

What are mycorhizza and if there were none, what would be the impact on the planet  and ecosystems?

Soil often goes through periods of extreme dryness and extreme wetness. What characteristics of clostridium species make them well suited for these conditions?

Define the life cycle of red algae.

What are hyphae and psedudohyphea?