Biology 1A Oct 6, 1998
Lecture 11 - Algae I
Page Contents :
Overview of Lecture:
What are algae?
There are six major groups of algae.
Euglenids are photosynthetic flagellates.
Unicellular organisms face many unique challenges.
Overview of Lab:
(A bullet indicates a handout.)
- Algal Identification and Morphology.
I. What are algae?
II. There are six major groups of algae.
III. Euglenids are photosynthetic flagellates.
IV. Unicellular organisms face many unique challenges.
|accessory pigment|| || ||
||fucoxanthin|| || ||
|alga|| || ||
||kelp forest|| || ||
|algal bloom|| || ||
||marine|| || ||
|alginate|| || ||
||paramylon|| || ||
|beta carotene|| || ||
||pectinate|| || ||
|benthos|| || ||
||pellicle|| || ||
|bioluminescence|| || ||
||photosynthate|| || ||
|cellulose|| || ||
||phytoplankton|| || ||
|chlorophyll a|| || ||
||pigment|| || ||
|cingulum|| || ||
||plankton|| || ||
|estuary|| || ||
||plastid|| || ||
|flagellae|| || ||
||red tide|| || ||
|freshwater|| || ||
||reef|| || ||
- What are algae?
- Where do algae grow?
- What are pigments? What pigments are found in all algae? How do pigments affect the depth at which algae prefer to live?
- Define "plankton". What part of the plankton are algae? What are the three most important groups of algal plankton?
- How do algae contribute to the habitats of animals? to their reproduction? to their survival?
- What are alginates and what are they used for commercially?
- How do we know that algae is a polyphyletic group? What does this mean?
- How many groups of algae are there? What are they?
- What characteristics are most useful for recognizing algal groups?
- What is a "photosynthate"? What are some examples of photosynthates? To which of the four classes of biological molecules do most photosynthates belong? Why are photosynthates important to algae?
- How many times have plastids evolved? How many times have chloroplasts evolved?
- What is the composition of a euglenid pellicle? Describe its properties. How is a pellicle different from a cell wall?
- Draw a euglenid and its major organelles. In which direction would it swim? How would it reproduce?
- Explain the origin of the euglenid chloroplast. What evidence supports this origin?
- What are two difficulties of being unicellular?
- How does the size of an organism affect its ability to move?
- How does viscosity of an organism's environment affect its ability to move?
- How is the dinoflagellate theca like a cell wall? How is it different?
- Draw a dinoflagellate and show its flagellae. How does each flagellum control cell movement?
- Why do dinoflagellates have chromist-like pigments?
- How do the chromosomes of dinoflagellates differ from those in other eukaryotes?
- What causes a "red tide"? Why are red tides dangerous? How do they affect fish? molluscs? people? How might a red tide affect birds that eat fish?
- When are red tides most likely to occur?
- What are zooxanthellae, and how are they important?
© 1998 Brian R. Speer. These pages for the personal use of students and teachers; any commercial use or publication is strictly prohibited.