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BIO 111 Exam #3 Questions And Accurate Solutions
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BIO 111 Exam #3 Questions And Accurate Solutionswhat do land plants evolve from? -Answer green algae
examples of green algae -Answer codium, ulva lactuca, caulerpa, spirogyra
what pigments are present in the green algae? -Answer chlorophyll a & b, B carotene
what type of group does the green algae form with plants? -Answer paraphyletic group
importance of land plants (3) -Answer produces a lot of O2, primary producers, and
holds soil
how long ago did plants come about? - Answer 465 million years ago
what was terrestrial Earth like before plants? - Answer very empty, many unicellular
organisms
what were the first land plants like? - Answer moss
Examples of nonvascular plants - Answer mosses, liverworts, hornworts
key adaptations of nonvascular plants (7) - Answer cuticle, stoma/stomata, flavonoids,
life cycle changes, dry resistant spores, gametes produced in complex structures, and
retention of embryo
cuticle - Answer prevents plants from drying out
, stoma/stomata - Answer opening in "skin" that controls gas exchange (carbon dioxide)
flavonoids - Answer UV absorbing compounds that prevent DNA damage
the nonvascular plant life cycle is mostly (haploid/diploid) - Answer haploid
(gametophyte)
gametophyte - Answer haploid (n), produce gametes
sporophyte - Answer diploid (2n), formed by fusion of gametes, produces spores
where are spores produced? - Answer sporangium
modifications of spores & sporangium (2) - Answers coated to reduce desiccation and
can disperse
Where are gametes produced? - Answers gametangium
what are the female & male gametangia? - Answers female- archegonia
male- antheridia
limitations of land plants (2) - Answers rely heavily on water and relatively small
adaptations of plants for terrestrialization (7) - Answers dehydration, water uptake, gas
exchange, sunlight, structural support, nutrient acquisition, reproduction
examples of seedless vascular plants- Answer ferns, club moss, horsetail
carboniferous period- Answer 300-350 million years ago
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