NCSU BIO 181 TEST 3 Questions and answers. VERIFIED. Rated A+

NCSU BIO 181 TEST 3 Questions and answers. VERIFIED. Rated A+ Green algae/ charophyceans - --Gave rise to first plants -multicellular -sexual reproduction that utilizes large eggs and smaller sperm. ancestral algae - --zygotic life cycle -haploid produces haploid eggs and sperm -after fertilized by a sperm the zygote is now diploid. -zygote immediately undergoes meiosis to produce haploid spores. They are released and divided by mitosis to form new algae. plants - --sporic life cycle -zygote is divided by mitosis to form a small multicellular structure. -this diploid structure could form a large number of spores by meiosis. bryophytes - --simplest plants 3 phyla of bryophytes - --Liverworts -Hornworts -Mosses vascular plants - --have roots, stems and leaves -roots absorb water and minerals from the soil. needed materials are transported throughout the plant by tracheal vessels. Ample water supply plus strenght of tracheal vessels allows these plants to grow taller than bryophytes. vascular plants are better adapted for life on land than bryophytes.... - --leaves are coated with waxy cuticle that prevents water loss by evaporation from leaf surface -Stomata regulates gas exchange and retard water loss. These are openings that allow passage of gases. -Have water conducting tissues composed of tracheids. The lignin in this makes tracheids stiff and also waterproofs them so water cannot escape. lycophytes - --small leaves with single vein pteridophytes - --seedless vascular plants that are NOT locophytes -ferns, whisk ferns, horsetails