BOT 1010L Lecture Notes - Lecture 3: Gnetophyta, Flowering Plant, Conifer Cone
Document Summary
Tips of stem bear cone-like structures containing sporangia. Rhizome a continuously growing horizontal underground stem that puts out lateral shoots and adventitious roots at intervals. Sporangia an enclosure in which spores are formed. It can be composed of a single cell or can be multicellular. All plants, fungi, and many other lineages form___________ at some point in their life cycle. In heterosporous plants, ___________ (whether they are microphylls or megaphylls) bear either megasporangia and thus are called megasporophylls, or microsporangia and are called microsporophylls. The spore produced by meiosis, such as the precursor cells of gametophytes of angiosperms and gymnosperms. Meiosis a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores. Mitosis is a part of the cell cycle in which chromosomes in a cell nucleus are separated into two identical sets of chromosomes, each in its own nucleus.
