Chapter 22 Introduction to Plants
Chapter 22.1
What is a Plant?
Define Vocabulary
Alternation of Generations
Sporophyte
Gametophyte
Activating Prior Knowledge
List some things that we already know about plants? What are some different types of plants?
Read “Think about it” on page 634
Characteristics of Plants
Plants are classified as members of the Plantae Kingdom.
Plants are Eukaryotes that have cell walls.
Plants undergo photosynthesis using chlorophyll a and b.
Most plants are autotrophs.
What Plants need
Sunlight: As energy to power photosynthesis.
Gas Exchange: Carbon dioxide is required to carry out photosynthesis. Gas exchange occurs in the atmosphere and in soil.
Water & Minerals: Plants absorb water, minerals & nutrients from the soil needed for plant growth. (See Fig. 22-2)
The History & Evolution of Plants
On pages 636- 637 Read & Discuss:
-Origins in the Water
-The First Land Plants
-An Overview of the Plant Kingdom
The Plant Life Cycle
Land plants have a distinctive life cycle that sets them apart from most other living organisms.
The life cycle of land plants have 2 alternating phases, a diploid (2N) phase and a haploid (N) phase.
The multicellular diploid (2N) phase is known as the sporophyte or spore-producing plant.
The multicellular haploid phase (N) is know as the gametophyte or gamete producing plant. (See Fig. 22-5 and 22-6)
Assessment
Complete 22-1 Worksheet, due next class period.
Chapter 22.2
Seedless Plants
Define Vocabulary
Bryophyte
Vascular tissue
Archegonium
Antheridium
Sporangium
Tracheophyte
Tracheid
Xylem
Phloem
Activating Prior Knowledge
Read “Think about it” on page 639
Read “ Green Algae” on page 639
The First Plants
Green algae are mostly aquatic. They are found in fresh and salt water and in some moist areas on land. (See Fig. 22-7)
See Fig. 22-10 on page 641
Assessment
Complete 22-2 Worksheet- Due next class period
Plant Lab- Please notify me if you allergic to any plant
Please study the parts of the Microscope below: We will go over the parts and function of each part in class.
