reproduction through spore formation can be seen in
a) spirogyra
b) fucus
c) oxalic
d) fern
Answers
Answer:
Reproduction through spore formation can be seen in Fern. Hence, [Option-d] is correct.
Step-by-step explanation:
In a common fern plant i.e, sporophytic fern, the branches are called as fronds and it consists of leaflets which are called as pinnae. Spores are found inside the sporangium which is found on the underside of some pinnae. These are called as fertile fronds. Spores are the reproductive structures in fern plants.
To carry out the life cycle of a fern, it requires two generation of plants. This is named as alternation of generations. The two plants are:
- Diploid - Sporophyte plant (Produces spores)
- Haploid - Prothallus plant (Produces gametes)
Through meiosis, the sporophyte produces haploid spores. Then, by mitosis, all the spores grows into a photosynthetic prothallus. The plantlet here is smaller when compared to sporophyte fern. These prothallus produces gametes. A prothallus can produce both the sperm and eggs on the same plantlet. The sperm produced is in a structure called antheridium, whereas the egg produced is in a structure called archegonium. When the water exists near the sperm, it swims through it by using its flagella to an egg and fertilises it. Then, the young sporophyte grows on the gametophyte which then be a new fern plant.
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