Green Algea 101
Which two groups are referred to as "green algae" in your lecture?
Chlorophyta and the Streptophyte Algae/Charophytes
Ulva belongs to what phylum?
Chlorophyta
Is the Ulva gametophyte haploid or diploid?
Haploid (n)
What is the name of the reproductive process shown between Spirogyra filaments?
Conjugation
An alga consisting of only one cell has what type of body morphology?
Unicellular
What reserve carbohydrate is found in Chlorophyta?
Starch
Spirogyra belongs to which major green-algal group discussed in lecture?
Streptophyte alga / charophyte
Is an Ulva sporophyte haploid (n) or diploid (2n)?
Diploid (2n)
What structure connects Spirogyra cells during conjugation?
Conjugation tube
An alga growing as long chains or threads of cells would be described as what?
Filamentous
What substance is found in the cell walls of both Chlorophyta and the streptophyte algae?
Cellulose
Is Chara classified as a Chlorophyta or a streptophyte alga?
Streptophyte alga / charophyte
What process changes the Ulva life cycle from 2n to n?
Meiosis
During conjugation, what acts as the gametes?
The protoplasts
What term describes algae in which multiple cells live together as a group or colony?
Colonial
Which group can have both diplohaplontic and haplontic life cycles: Chlorophyta or the streptophyte algae?
Chlorophyta
What process changes the Ulva life cycle from haploid (n) back to diploid (2n)?
Fertilization
What structure forms when the Spirogyra gametes/protoplasts fuse?
A zygote
Name the THREE structures listed in the lecture that may occur in more complex algal bodies.
Stipe, blade, and holdfast
Chlorophyta and streptophyte algae have the same three photosynthetic pigments in this lecture. Name all three:
Chlorophyll a, chlorophyll b, and carotenoids
A green alga has a haplontic life cycle and zygotes with sporopollenin in their walls. Which major green-algal group from this lecture does that description match?
Streptophyte algae / charophytes
The Ulva life cycle is described as isomorphic. What does this mean?
The gametophyte and sporophyte have the same morphology / look alike
Put these three events in the correct order:
Zygote forms, conjugation tube forms, protoplasts/gametes fuse
Conjugation tube forms → protoplasts/gametes fuse → zygote forms
Name FOUR of the six general algal body morphologies listed in the lecture
Any four of:
Unicellular, filamentous, colonial, thalloid, crustose, coralline