Lecture 12-Algae

Question 1

Differences between algae and land plants?

Answer 1

1. Evolutionary lineages

2. Morphology/Anatomy

Question 2

Challenges of land life?

Answer 2

1. Gravity
2. Dessication (Getting water)
3. CO2 abundant but waxy surfaces impede absorption.
4. Light abundant but competition

Question 3

Gametophyte or sporophyte dominant in non-vascular plants (Bryophytes)?

Answer 3

Gametophyte.

Question 4

Does antheridia and archegonia contain egg or sperm?

Answer 4

Antheridia: Sperm
Archegonia: Egg

Question 5

Characteristics of Xylem?

Answer 5

• Made of tracheids
• Move water and minerals
• Roots to shoots
• Dead
• Driven by transporation

Question 6

Characteristics of Phloem?

Answer 6

• Cells arranged into tubes (sieve tubes)
• Move organic product throughout plant
• Alive
• Source to sink

Question 7

What are sporophylls?

Answer 7

Modded leaves where sporangia are produced