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https://www.thoughtco.com/fern-life-cycle-4158558
The egg is a diploid zygote formed by the combination of DNA from the egg and sperm. The zygote grows via mitosis into the diploid sporophyte, completing the life cycle. Before scientists understood genetics, fern reproduction was mystifying. It appeared as though adult ferns arose from spores.
https://www.britannica.com/plant/fern/Sexual-reproduction
The sex organs of ferns are of two types. The sperm-producing organ, the antheridium, consists of a jacket of sterile cells with sperm-producing cells inside. Antheridia may be sunken (as in the families Ophioglossaceae and Marattiaceae) or protruding.
https://sciencing.com/how-are-conifers-ferns-different-12435159.html
Conifers are gymnosperms or "naked seed plants" in the phylum Coniferophyta. Ferns are non-seed plants in the phylum Pterophyta. The groups have different life cycles. Ferns produce spores that develop into gametophytes. Male gametophytes produce sperm, …
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Dec 08, 2010 · Contrast the mode of sperm delivery in ferns with sperm delivery in conifers In conifers, regular meiosis takes the pollen grains into the ovule fertilizing and producting a seed. In ferns, it is carried through the anteridium to the archegenium where fertilization takes place
https://www.biologyjunction.com/moss__fern_notes_b1.htm
Sexual Reproduction in Moss: Mosses produce 2 kinds of gametes (egg & sperm) Gametes of Bryophytes are surrounded by a jacket of sterile cells that keep the cells from drying out. Female gametes or eggs are larger with more cytoplasm & are immobile.
https://quizlet.com/146196233/mastering-biology-plants-fungi-the-move-onto-land-ch-16-flash-cards/
Contrast the modes of sperm delivery in ferns and conifers. The flagellated sperm of ferns must swim through water to reach eggs. In contrast, the airborne pollen of conifers delivers sperm to eggs in ovules without the need to go through water.
http://www.tulane.edu/~bfleury/diversity/labguide/mossfern.html
Like the bryophytes, ferns and fern allies are still restricted to moist habitats. Their flagellated sperm need a thin film of water to swim between the antheridium and the archegonium. And when the baby sporophyte grows up from the gametophyte, it is exposed to desiccation (drying up).
https://answers.yahoo.com/question/index?qid=20091105130810AAht7mF
Nov 05, 2009 · In what sense can ferns be considered intermediate between bryophytes and higher plants? What stage is dominant in ferns? What is the primary method of dispersal in ferns? How is water transported? Why are ferns more common in moist habitats? Why do mosses usually grow only in moist, shady habitats? Whats the difference between mode of sperm delivery in ferns with sperm delivery …
https://answers.yahoo.com/question/index?qid=20090411234937AAiJ4VP
Apr 11, 2009 · Both mosses and ferns "show their aquatic ancestry" because? ... B. they require water for sperm delivery to the egg. ... Relevance. aditya. 1 decade ago. Favorite Answer. It is B. All the mosses and ferns require water for the transport of the male gamete towards the female gamete in response of a chemotactic movement... 0 1 0. Login to reply ...
https://quizlet.com/4269184/plant-diversity-ii-flash-cards/
In gymnosperms, the 4-celled pollen grain is what remains of the male gametophyte - a sperm delivery device floating in the air. Distinguish between pollination and fertilization. Pollination is the delivery of pollen and its deposition on the recipient (micropyle of the ovule in the case of gymnosperms).
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