BIOL 112 Exam 3 Review - TAG (TAMU)
Questions with Quality Answers.
Leaves - Answer evolved from branched stems
- microphylls first (single vein) only present in lycophytes
Chlorophytes, Charophytes, & Plantae (common characteristics) - Answer - multicellular
- cell walls (cellulose)
- chloroplasts w/ same pigments (chlorophyll a & b)
- starch is the storage molecule
Charophytes & Plantae (common characteristics) - Answer - liverworts as flagellated sperm
- cellulose synthesis proteins (rings)
- cytokinesis (cell plate formation)
- sporopollenin
Sporopollenin - Answer durable polymer that protects:
- zygotes (in charophytes)
- spores (seedless plants)
- pollen grains (seeded)
Advantages of Land - Answer - CO2 higher
- light intensity higher
- more minerals
- no "herbivores"
- no competition
Disadvantages of Land - Answer - risk of desiccation
- divided resources (air vs. land)
- no "support" in air
Plant Life Cycle - Answer alternation of generations:
- produce many unique spores
, Charophyte Life Cycle - Answer alternation of generations:
- only multicellular is haploid
- diploid is only zygote
1. Alternation of Generations (1-8 = derived characteristics) - Answer - haploid and diploid
phases
2. Walled haploid spores - Answer - diapers through air
- sporopollenin protects
- made in sporangium
3. Gametangia (multicellular) - Answer - protect sperm w/in antheridium
3. Egg - Answer - protected w/in archegonium
(fertilization here; forms zygote)
4. Sporophyte embryo grows - Answer - in female gametophyte
- nourished via placental transfer cells
5. Apical Meristems - Answer - roots & shoots grow toward resources (continually dividing)
6. Waxy Cuticle - Answer - prevents desiccation
- forces exchange of CO2, O2, H2O to happen through pores
7. Secondary Compounds - Answer - chemicals that deter/repel/poison competitors,
herbivores & parasites
8. Mycorrhizae - Answer - mutualism w/ fungi (nutrient absorption)
Derived characteristics of plants - Answer 1. Alternation of generations
2. Walled haploid spores
3. Multicellular gametangia & eggs
4. Sporophyte embryos protected by female gametophyte
5. Apical Meristems
6. Waxy Cuticle
Questions with Quality Answers.
Leaves - Answer evolved from branched stems
- microphylls first (single vein) only present in lycophytes
Chlorophytes, Charophytes, & Plantae (common characteristics) - Answer - multicellular
- cell walls (cellulose)
- chloroplasts w/ same pigments (chlorophyll a & b)
- starch is the storage molecule
Charophytes & Plantae (common characteristics) - Answer - liverworts as flagellated sperm
- cellulose synthesis proteins (rings)
- cytokinesis (cell plate formation)
- sporopollenin
Sporopollenin - Answer durable polymer that protects:
- zygotes (in charophytes)
- spores (seedless plants)
- pollen grains (seeded)
Advantages of Land - Answer - CO2 higher
- light intensity higher
- more minerals
- no "herbivores"
- no competition
Disadvantages of Land - Answer - risk of desiccation
- divided resources (air vs. land)
- no "support" in air
Plant Life Cycle - Answer alternation of generations:
- produce many unique spores
, Charophyte Life Cycle - Answer alternation of generations:
- only multicellular is haploid
- diploid is only zygote
1. Alternation of Generations (1-8 = derived characteristics) - Answer - haploid and diploid
phases
2. Walled haploid spores - Answer - diapers through air
- sporopollenin protects
- made in sporangium
3. Gametangia (multicellular) - Answer - protect sperm w/in antheridium
3. Egg - Answer - protected w/in archegonium
(fertilization here; forms zygote)
4. Sporophyte embryo grows - Answer - in female gametophyte
- nourished via placental transfer cells
5. Apical Meristems - Answer - roots & shoots grow toward resources (continually dividing)
6. Waxy Cuticle - Answer - prevents desiccation
- forces exchange of CO2, O2, H2O to happen through pores
7. Secondary Compounds - Answer - chemicals that deter/repel/poison competitors,
herbivores & parasites
8. Mycorrhizae - Answer - mutualism w/ fungi (nutrient absorption)
Derived characteristics of plants - Answer 1. Alternation of generations
2. Walled haploid spores
3. Multicellular gametangia & eggs
4. Sporophyte embryos protected by female gametophyte
5. Apical Meristems
6. Waxy Cuticle
