BIO 1108 FINAL EXAM QUESTIONS AND
ANSWERS A+ GRADED
What did plants originate from? (Chapter 29)
green algae 470 mya
Charophytes (Chapter 29)
green algae (photosynthetic protists) that are the closest relatives of land plants
What are some key traits of plants and algae? (Chapter 29)
1) some of both are: MULTICELLULAR, EUKARYOTIC, and PHOTOSYNTHETIC
AUTOTROPHS
2) some of both have: CELLULOSE IN THERE WALLS and CHLOROPLASTS
CONTAINING CHLOROPHYLL A and B
What are some benefits and challenges of plants moving to land? (Chapter 29)
Benefits:
1) unfiltered sunlight
2) more plentiful CO2
3) nutrient rich soil
Challenges:
1) scarcity of water
2) lack of structural support against gravity
Where is diploid embryo protected and retained in alternation of generations?
(Chapter 29)
In the tissue of the FEMALE gametophyte - it is throught here that nutrients is
transferred to the embryo via placental transfer cells
What 3 key traits are apparent in plants but ABSENT in charophytes? (Chapter 29)
1) alternation of generations
2) walled spores produced in sporangia
3) apical meristems
Alternation of generations (Chapter 29)
the alternation between the haploid gametophyte and the diploid sporophyte in a plant's
life cycle
Sporangia (Chapter 29)
Spores in multicellular organs that are produced by sporophytes
sporopollenin (Chapter 29)
Contained in spore walls; FUNCTION: makes the spore walls resistant to harsh
environments
apical meristem (Chapter 29)
A localized region of cell division at the tips of roots and shoots; these cells divide
continuously which enable elongation of roots and shoots for better resource attainment
Cuticle (Chapter 29)
A waxy covering of the epidermis that reduces water loss
Stomata (Chapter 29)
Pores that facilitate gas exchange between outside air and internal plant tissues
What did early plants lack?
ANSWERS A+ GRADED
What did plants originate from? (Chapter 29)
green algae 470 mya
Charophytes (Chapter 29)
green algae (photosynthetic protists) that are the closest relatives of land plants
What are some key traits of plants and algae? (Chapter 29)
1) some of both are: MULTICELLULAR, EUKARYOTIC, and PHOTOSYNTHETIC
AUTOTROPHS
2) some of both have: CELLULOSE IN THERE WALLS and CHLOROPLASTS
CONTAINING CHLOROPHYLL A and B
What are some benefits and challenges of plants moving to land? (Chapter 29)
Benefits:
1) unfiltered sunlight
2) more plentiful CO2
3) nutrient rich soil
Challenges:
1) scarcity of water
2) lack of structural support against gravity
Where is diploid embryo protected and retained in alternation of generations?
(Chapter 29)
In the tissue of the FEMALE gametophyte - it is throught here that nutrients is
transferred to the embryo via placental transfer cells
What 3 key traits are apparent in plants but ABSENT in charophytes? (Chapter 29)
1) alternation of generations
2) walled spores produced in sporangia
3) apical meristems
Alternation of generations (Chapter 29)
the alternation between the haploid gametophyte and the diploid sporophyte in a plant's
life cycle
Sporangia (Chapter 29)
Spores in multicellular organs that are produced by sporophytes
sporopollenin (Chapter 29)
Contained in spore walls; FUNCTION: makes the spore walls resistant to harsh
environments
apical meristem (Chapter 29)
A localized region of cell division at the tips of roots and shoots; these cells divide
continuously which enable elongation of roots and shoots for better resource attainment
Cuticle (Chapter 29)
A waxy covering of the epidermis that reduces water loss
Stomata (Chapter 29)
Pores that facilitate gas exchange between outside air and internal plant tissues
What did early plants lack?
