How is Alternation of Generations Different in Ferns and Pines
In the ferns the two generations (diploid sporophyte and haploid gametophyte) exist as separate plant bodies; the gametes are produced by mitosis in the haploid prothallus gametophyte, water is needed for fertilization and both generations are able to photosynthesize.
In pines (gymnosperms) the dominant generation of the gymnosperm life cycle is the long-lived sporophyte, and the gametophyte generation is inconspicuous. The male gametophyte, the pollen grain, is not dependent on water for sperm transfer. The female gametophyte, the ovule, is nutritionally dependent on the sporophyte.
Many people may be surprised to learn that ferns and pines share an interesting commonality with one another in the way they alternate their generations. As ferns are a type of plant that grows from spores, they rely on wind to spread these spores successfully. This causes them to release their spores up into the air when it is dry, which helps them achieve this goal.
Ferns and pines differ in how the alternation of generations plays out. Ferns do not exhibit alternation of generations because their life cycle consists of a haploid gametophyte and a diploid sporophyte that develop from it. The sporophyte produces spores and then dies, and the gametophytes produce gametes by mitosis which go on to form new sporophytes.
Ferns vs pines:
Ferns and pines belong to two very different plant groups, but they do share the same process of alternation of generations. Ferns develop from spores and so they produce gametes and eggs for reproduction. Pines reproduce by seeds and their spore-producing stage is called a sporophyte which does not produce other cells for fertilization or germination.
In recent years, there has been a lot of discussion about whether or not to plant ferns or pines. Pine trees are known for being long-lived, but they can be costly to take care of and they can consume more water than ferns. Ferns require less water and care, but may not last as long as pines. Many people plant them both in order to get the best of each.
Ferns and Pines have a different way of going through the Alternation of Generations.
Ferns: Ferns reproduce sexually, so they have two phases of alternation. The sporophyte phase is dominant over the gametophyte phase.
Pines: Pines reproduce asexually, so they only have one phase of Alternation. The sporophyte phase is dominant in their reproduction process.
Conclusion: Ferns and pines are similar .
