A. The gymnosperms evolved during the Permian period and dominated the Mesozoic Era. BRIEFLY describe five (5) characteristics of gymnosperms that allowed them to better colonize the terrestrial habitat and, dominate the early Mesozoic than did pteridophytes.
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- a. How are the angiosperms classified according to the Angiosperm Phylogeny Group (APG)? b. What is the present understanding about the origin of flowering plants, and the classification of angiosperms into “monocots” and “dicots”, based on most recent evidences? c. The work of plant taxonomists of the 20th century who identified /established the different families of flowering plants based mainly on morphological and anatomical details is still valued and being used today, despite the general acceptance of the Angiosperm Phylogeny Group (APG) as a classification system for the flowering plants. Explain why.Which of the following traits characterizes gymnosperms? a. The plants carry exposed seeds on modified leaves. b. Reproductive structures are located in a flower. c. After fertilization, the ovary thickens and forms a fruit. d. The gametophyte is longest phase of the life cycle.working in the field, you discover a fossil of a previously undescribed plant species. the specimen is small and may not be complete; the parts you have do not include any floral organs. what sort of observations(evidence) would you need in order to classify the fossil as a vascular plant with reasonable accuracy? what evidence would you need to distinguish between an angiosperm and a gymnosperm?
- 1. It is considered the oldest seed plant to date.2. These are structures in Elkinsia that protect the ovule.3. Conifers evolved during this period.4. A group of gymnosperms that undergo double fertilization like the floweringplants.5-7. Mention three adaptive advantages of the seed.8. Besides the seed, what other structure is a reproductive adaptation in seedplants?Part 1: Identify the haploid and diploid generations of the following plants. (Examples are found in your prelab reading) Identify the Bryophyte and if it is in its haploid or diploid reproductive state. A hornwort Haploid B Moss Haploid C Liverwort Haploid List the stages of the life cycles for all three classes of Bryophytes starting from the spore stage. 中 Mosses Liverworts Hornworts Spore Spore Spore How does the life cycle of nonvascular plants differ from that of vascular plants? Why are ferns considered vascular plants even though they share a life cycle similar to Bryophytes?There are four phyla that belong to the gymnosperm. Describe Phylum Ginkgophyta and explain why and how Ginkgo biloba became the only surviving species. What is the importance of this species to man?
- 1. Of the plant groups included in Figure 1-1, which taxes have seeds? 2. Are the angiosperms more closely related to the bryophytes or the gymnosperms? 3. Explain your answer to question #2 4. Circle the node in Figure 1-1 that indicates the most recent common ancestor of gymnosperms and angiosperms. 5. List the characters that differentiate monocots and eudicots ( two groups of angiosperms) as seperate branches on the phylogenetic tree. In addition, give several examples of each.The Apiaceae is closely related to the Araliaceae, the family to which ginseng and octopus tree belong. Know the characters which the two families share in List down features of Asteraceae that are considered advanced relative to other dicotyledonous families.A team of botanists discovers a new species of plant in a tropical rain forest. After observing its anatomy and life cycle, they note the following characteristics and observations: 1. Presence of pollen cones and ovulate cones 2. Diploid-dominant 3. Seeds 4. vascular tissues 5. Absence of anything that resembles a flower This plant is probably a(n) Group of answer choices moss angiosperm protist gymnosperm fern
- Most extant species of gymnosperms are now considered as "living fossils", why is that so? Give some insights on why gymnosperms were not able to dominate land despite of having seeds.You have been hired as research assistant to investigate the origins of the angiosperms, specifically the boundary between a gymnosperm and an angiosperm. Which characteristics would you use to clearly define a new fossil as a gymnosperm? An angiosperm?Which group of plants bears stomata only in the sporophyte generation? a. Chrysophyta b. Anthocerophyta c. Bryophyta d. Marchantiophyta Which of the following is not a characteristic that distinguishes gymnosperms and angiosperms from other plants? a. Pollen b. Dependent gametophytes c. Ovules d. Alternation of generations Which of these statements is an incorrect comparison of a pine cone and a flower in terms of structure and function? a. Pine cones and flowers both have gametophytes and modified leaves that produce spores. b. All of the statements are correct. c. Unlike pine cones, many flowers produce both pollen and ovules. d. Pine trees have separate pollen cons and ovulate cones while in flowers, pollen grains are produced by the anthers of stamens, and ovules are within the ovaries of carpels.