Description of plants based on survival of Ancient Groups
Question 1: Survival of Ancient Groups Describe the structures and life histories of Lycophytes, Sphenophytes and Psilophytes, using three modern genera, Selaginella, Equisetum, and Psilotum. Include in your answer: a. desсrіptions of the life histories and the nature of their spores b. desсrіptions of their vascular tissue and steles c. desсrіptions of their gametophytes and their separate or cosexual natures Describe and discuss primary and secondary growth in plants. Include in your answer: a. the definitions of primary and secondary growth and the locations where they are initiated b. the cell types and tissues produced by primary and secondary growth and their functions c. a comparison of the architecture of primary tissues in monocots and eudicots d. a comparison of the architecture of secondary tissues in gymnosperms and angiosperms Describe and discuss the second major flora (the “Coal Age Flora”) that evolved on Earth. Include in your answer: a. references to geologic time of this flora b. the changes to continents and the atmosphere that contributed to the rise and fall of this flora c. a desсrіption of the changes in vascular tissue and steles that allowed trees of great heights d. the nature of and transition from microphylls to megaphylls e. desсrіptions of dominant members of this flora Describe the alternation of generations life histories of seedless and seed producing vascular plants using ferns and gymnosperms as examples. Include in your answer: a. compare and contrast the structures and processes of the life histories of ferns and pines b. a desсrіption of how homosporous ferns can produce male and female gametophytes c. a desсrіption of the changes in structure and function of the tissues and stages that led to the development of the seed d. a full desсrіption of what defines a seed