WebMay 14, 2024 · Reason: The gametophyte is dependent upon the sporophyte phase. Answer Answer: (b) Pinus shows alternation of generations. The sporophyte phase is long and represented by the huge pine tree bearing the staminate and ovulate cones. Meiotic divisions occur at the same time as the differentiation of the pollen grains and megaspores. WebNEET Biology Chapter Wise Mock Test-Plant Kingdom 1. Holdfast, stipe and frond constitutes the plant body incase of (a) Rhodophyceae (b) Chlorophyceae (c) Phaeophyceae (d) All of these 2. Floridian starch is the stored food material in (a) Chlorophyceae (b) Phaeophyceae (c) Rhodophyceae (d) Blue-green algae 3. Presence …
Nephrolepis biserrata (giant sword fern) CABI Compendium
Webproduce a diploid zygote which develops into the sporophyte. The sporophyte produces haploid spores which germinate to form gametophytes. Pteridophytes possess well differentiated sporophyte with root, stem and leaves. The sporophyte bears sporangia which produce spores. The spores germinate form an independent gametophyte. The WebThe zygote undergoes mitosis to form a multicellular, diploid sporophyte, the frond-bearing structure that we usually think of as a fern. On the sporophyte, specialized structures called sporangia form, and inside of them, haploid cells (spores, 1n) are formed by meiosis. The spores are released and can germinate, starting the cycle over again. temasek jc matrix
(PDF) Associated microflora of medicinal ferns: biotechnological ...
WebSexual Reproduction. Sexual reproduction involves the mixing of genes from two different parents to give offspring with a genetic make-up similar to, but different from, each parent. In bryophytes the process requires the production of male gametes (sperm), female gametes (eggs) and some means of getting the sperm to the eggs. WebThe Lycophyta, to which Lycopodium (Clubmoss) and Selaginella (Spikemoss) belong, have vascular bundles for the transport of water, minerals and sugars. Thanks to these veins they can become bigger than mosses. The Lycophyta possess small microphyll leaves (microphyll = with a single, unbranched vascular bundle) arranged in a spiral. WebNephrolepis (Common fern). Nephrolepis is a common fern which grows in moist, cool and shaded places in forests, hills, etc. Nephrolepis exaltata is a common species.. Various stages in the life cycle of Nephrolepis are completed in two phases. Each phase is known as a generation.The sporophyte generation is the dominant phase while the … rim hre