Bio 108 - Lecture 9 Flashcards Preview

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Flashcards in Bio 108 - Lecture 9 Deck (17):
1

Four Main Groups of plants

1) Non-Vasular Plants
2) Seedless Vascular Plants
3) Gymnosperms
4) Angiosperms

2

Plants are most closely related to...

Charophytes

3

3 Features Land Plants Share with Charophytes

1) Rossette-Shaped cellulose-synthesizing complexes
2) Structure of Sperm (flagellated)
3) Presence of Phragmoplast during cell division

4

Kingdom Viridiplantae
Virid = ?

The kingdom that could put cholorphytes, charophyceans, and embrophytes in this kingdom.
Virid = Green

5

6 Characteristics that separate plants from Charophycean algae ?

1) Multicellular, dependant embroys
2) Alternation of Generations
3) Sporopollenin
4) Adaptations for Water Conservation
5) Lignified vascular Tissue
6) Apical Meristems

6

Characteristic of Multicellular, Dependant Embryos

- Zygote retained within tissues of female parents
- Parent provides nutrients through special embryonic plancental cells

7

Alternation of Generations

A life cycle in which haploid multicellular and diploid multicellular body forms alternate

8

Sporopollenin

Tough polymer in wall of plant spores, resistant to drying
- None in aquatic spores

9

2 Adaptations Plants have for water conservation

1) Waxy Cuticle - On epidermis acts as waterproofing
2) Stomata - Pores in the leaves allow gas exchange

10

Lignified Vascular Tissue (2 Types)

- Used for internal transport
1) Xylem - cells carry water and minerals up
2) Phloem - cells distribute organic products

11

Apical Meristems

Undifferentiated tissue from which new, differentiated cells arise

12

2 Features terrestrial Plants have that aquatic don't

1) More compartmentalized resources
2) Structure show specalization for searching for water & minerals underground, and light and gas above.

13

Three Phyla of Non Vascular Plants

1) Phylum Heptophyta
2) Phylum Anthocerophyta
3) Phylum Bryophyta

14

Bryophytes

- Lack true vascular tissue
- lack lignin
- Lack of supporting tissue keeps them small
- Haploid gametophytes and most dominant phase

15

Bryophyte Sperm / Egg Ograns

Female Archegonium
Male Antheridium - flagellated sperm

16

Bryophyte Life cycle

- Sperm must swim through water film, need moist places
- Sporophytes release 1000's of asexually produced spores

17

Economic Uses for Bryophytes

Sphagnum moss forms peat, peat used as fuel
dead cells harvested for soil conditioner because they can hold water