Year: 2022

DIPLOID SPOROPHYTE. “By contrast, the diploid, or sporophytic, generation begins after fertilization with the zygote and forms the mature plant with vegetative organs (leaf, stem, root) and flowers that contain the reproductive organs (anther and pistil).” http://www.jstor.org/stable/pdf/2885440.pdf?seq=1#page_scan_tab_contents View in LinkedIn

MORPHOGENESIS. “Most morphogenic events in flowering plants occur in the postembryonic sporophyte after seed germination.” http://www.jstor.org/stable/pdf/2885440.pdf?seq=1#page_scan_tab_contents View in LinkedIn

CONTINUOUS ORGANS. “Vegetative organ systems differentiate continuously from root and shoot meristematic regions that are formed initially during embryogenesis.” http://www.jstor.org/stable/pdf/2885440.pdf?seq=1#page_scan_tab_contents View in LinkedIn

TRANSITION. “Meiosis marks the transition to the gametophytic phase, and fusion of the gametes during fertilization starts the embryonic phase of the next generation.” https://lnkd.in/gkwnBWu View in LinkedIn

THE SET-ASIDE. “The reproductive organs of the flower are differentiated from a reprogrammed shoot meristem after the seedling has become a mature plant. Thus, a germline analogous to that found in animals is not set aside during plant embryogenesis.” https://lnkd.in/g_k-4-g View in LinkedIn

SO ENDS this first weekend on the differences between plants and animals. Plants are completely different from animals, in structure, development, reproduction, and evolution. It could be argued that it is surprising that these two kingdoms mesh together so well, having so few similarities. But plants essentially form the first complex molecules from sunlight that fuel most of the other creatures on earth. View in LinkedIn

COMBINED SETS. "A well-known case is that of the Japanese wrinkled frogs, Rana rugosa, where separate XY and ZW populations exist. All four sex chromosomes are descendants of the same linkage group. They have diverged independently already carrying different sets of lethal genes." http://www.pnas.org/content/112/34/10575.full View in LinkedIn

CHROMOSOME NUMBER. "The number of chromosomes is one of the most fundamental features of a eukaryotic genome. Chromosome number varies, both between closely related species and within species, and such variation can contribute to divergent adaptation and speciation." https://lnkd.in/g2CPWtY View in LinkedIn

FAST EVOLUTION. "Structurally, sex chromosomes are the most rapidly evolving parts of the genome in many groups of animals." https://lnkd.in/g2CPWtY View in LinkedIn

TWO SYSTEMS. "Genetic sex-determining systems in vertebrates include two basic types of heterogamety, which are represented by the XX/XY and ZZ/ZW types. Both types occur among amphibian species." https://lnkd.in/gFCg7HY View in LinkedIn