Download Lab #2 Question Sheet

Name: ________________
September 2013
Biology 102
Laboratory 2: Seedless Plants Pre-Lab
Directions: The answers to these questions can be found in the lab manual (p.
348 to 361) and text book (Chapter 32 – The Evolution of Plants: p. 661 to 669).
1) Plants are complex, eukaryotic, and multicellular organisms and their closest
living ancestor are unicellular aquatic green algae charophytes in the phylum
Chlorophyta.
a. Recall last week’s lab, what protist species is in the phylum Chlorophyta?
Draw and identify the food habits of this organism.
2) Plants have to overcome many challenges to living in a terrestrial environment
(on the land).
a. What is an adaptation that plants have to reduce water loss?
b. Because terrestrial plants do not living in water, they need a way to get
minerals, nutrients, and water to and from their cells.
i. Identify the key evolution innovations that allows vascular plants to
transport water and minerals from the roots to the leaves and
nutrients (produced by photosynthesis) from the leaves to the
roots.
ii. Identify which plant from lab (Mosses or Ferns) have this
adaptation.
3) A major evolutionary innovation that allowed plants to thrive in a terrestrial
environment is called the alternation of generations.
a. Define the life cycle called “alternation of generations”? Define
gametophyte and sporophyte. Which type of plant tissue has haploid
tissue and which type of tissue has diploid tissue?
b. Describe the life cycle of mosses and their two generations.
4) Why do mosses and ferns have to live close to water and in moist environments?