QQuestion
Explain the alternation of generation in Fern with the help of a word diagram.
✓Answer
In the life cycle of a fern, alternation of generation means there are two distinct forms: the sporophytic generation (diploid) and the gametophytic generation (haploid), which alternate with each other. The sporophyte produces haploid spores by meiosis, which grow into a gametophyte. The gametophyte produces gametes that fuse to form a diploid zygote, growing into a new sporophyte.
Word Diagram:
Sporophyte (2n) → Meiosis → Spores (n) → Gametophyte (n) → Gametes (n) → Fertilization → Zygote (2n) → Sporophyte (2n)
Related Questions
More WBBSE Moderate level questions
Explain the following three significances of cell division- Growth Repair Reproduction Tabulate the site of occurrences of meiotic cell division in the living world. [3+2=5] OR Explain the process of micropropagation. Distinguish between asexual and sexual reproduction on the basis of the following three features - No. of Parental organisms Cell Division Origin of variation [2+3=5]
Show the alternation of generation in fern with the help of a word diagram. OR Show the process of sexual reproduction in flowering plants with the help of a word diagram.
c — Asexual Reproduction Sexual Reproduction I. Requires two parental organisms of opposite sex belonging to the same species. Offsprings can be formed from a single parental organism. II. This type of reproduction is completed through cell division or through the production of spores. This type of reproduction is completed through the production of gametes and their union. III. Depends on amitosis, mitosis and meiosis. Depends on meiosis. IV. Variations are found in offsprings. The offsprings become identical to their parents. Options: (a) I, IV (b) II, III (c) III, IV (d) I, II
Describe how Yeast completes the process of budding.
Explain how Bryophyllum undergoes vegetative propagation with the help of an adventitious bud.
How is micropropagation performed? Which phenomena occur during telophase stage of mitosis in an animal cell? [3 + 2]
Explain the following two methods of asexual reproduction: (a) Budding (b) Regeneration
Which of the following stages is not included under the Sporophytic generation in the alternation of generations of the fern? (a) Prothallus (b) Sorus (c) Sporangium (d) Spore mother cell
On the basis of the relationship between the first pair of words write a suitable word in the gap of the second word pair. Fragmentation : Spirogyra :: Budding : _______.
'Scarcity of food and poaching are two main reasons behind the endangeredness of a mammal found in Eastern Himalayas biodiversity hotspot' - Justify the validity of the statement.
Explain the causes of endangeredness of Polar Bear and Gangetic Dolphin.
What environmental problems can originate if the concentration of different greenhouse gases polluting air increases in a steady manner?