Week 3 Quiz:

1) What are the bright green dots in these cells? (1 pt)

Week 3 Quiz:2) This is a close up of cells from a Ulva thallus. Is this the thallus of the sporophyte (2n) or gametophyte (n), or do you need more information before you decide? ( 1 pt)

3) Explain you answer above (why you chose sporo- or gametophyte, or what other information you would need). (2 pts)

Week 3 Quiz:4) Here are two fusing Chlamydomonas.

Which statement is false? (2 pts)

a) Before this picture was taken, these cells were each haploid.

b) Once fused, the resulting cell will undergo mitosis to produce zoospores.

c) The Chlamydomonas life cycle is haplontic.

d) Chlamydomonas can reproduce without the fusion of two cells.

Week 3 Quiz:

5) This Bryopsis is coenocytic. What does that mean? (2 pts)

6) T or F: Much like land plants, Bryopsis shows apical growth, complete with braches that form from a main axis. (1 pt)

7) This is Valonia. Most of the mass of these large cells can be attributed to: (1 pt)

a) the large number of choloplastsb) Valonia is coenocytic, so the large number of

nucleic) a very thick cell walld) a large central vacuole