Which of the following statement is incorrect with respect...

Name: Problem 77, Chapter 3: Objective Biology for NEET
Uploaded: 2021-09-29T08:35:50-08:00
Duration: 2 min 2 s
Channel: Anitha Mary
Description: Which of the following statement is incorrect with respect to bryophytes? (a) The plant body is thallus like, more differentiated than algae and attached to substratum by the help of rhizoids. (b) The antherozoids are released in water for fertilization. (c) Zygote formed undergoes meiotic cell division immediately. (d) They have leaf like, stem like and root like structures.

Which of the following statement is incorrect with respect to bryophytes? (a) The plant body is thallus like, more differentiated than algae and attached to substratum by the help of rhizoids. (b) The antherozoids are released in water for fertilization. (c) Zygote formed undergoes meiotic cell division immediately. (d) They have leaf like, stem like and root like structures.

Which of the following statement is incorrect with respect to bryophytes?
(a) The plant body is thallus like, more differentiated than algae and attached to substratum by the help of rhizoids.
(b) The antherozoids are released in water for fertilization.
(c) Zygote formed undergoes meiotic cell division immediately.
(d) They have leaf like, stem like and root like structures.

Key Concepts

Bryophyte Morphology

Bryophytes are non-vascular plants that typically have a simple body organization. Their body, which may be thalloid or leafy, is generally small and lacks complex vascular tissues. Despite their simplicity, they show a level of differentiation from algae by having structures that secure them to substrates through rhizoids and by developing more complex tissue organization than algae.

Fertilization in Bryophytes

In bryophytes, the reproductive process involves the production of motile sperm (antherozoids) that require a film of water to swim towards the egg for successful fertilization. This dependency on water for the transfer of sperm highlights the adaptation of bryophytes to moist environments and is a key aspect of their reproductive biology.

Life Cycle and Alternation of Generations

Bryophytes exhibit an alternation of generations, where the dominant gametophyte generation produces gametes. After fertilization, the zygote develops into a sporophyte, which is typically attached to and nutritionally dependent on the gametophyte. The sporophyte later undergoes meiosis to produce haploid spores, marking the transition in the life cycle from diploid to haploid stages.

Cell Division Processes in Bryophyte Reproduction

An important concept in understanding bryophyte reproduction is the type of cell division that occurs after fertilization. Contrary to some misconceptions, the zygote in bryophytes first undergoes mitotic divisions to develop the sporophyte body, and only later does it produce spores via meiotic division. This sequence is fundamental in distinguishing the reproductive cycle of bryophytes from other plant groups.

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