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Why are Bryophytes, like mosses, are small?
I. Lack vascular tissue
II. Depend on water as a medium for their sperm transfer
III. Evolved before other land plants
А) I is true
B) Il is true
С) III is true
D) I and II are both true
E) I and Ill are both true

Last updated date: 22nd Feb 2024
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IVSAT 2024
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Hint: Since bryophytes are land plants, they must rely on air to survive. Since they lack lignified vascular tissues, they rely heavily on the turgor pressure of their cells for support. As a result, they cannot grow very tall, and most bryophytes are small and unnoticeable.

Complete solution:
Bryophytes lack vascular tissue.
Hence, option A, is incorrect
Bryophytes depend on water as a medium for their sperm transfer. So, the statement is correct. Hence, option B is incorrect.
Bryophytes do not evolve before other land plants.
Hence option C is incorrect.
Mosses are small bryophytes since they are nonvascular plants with just a few water conducting strands in the central stem. Because of their small size, they must rely on diffusion to move water in and out of the plants and to transfer sperm. Their reproductive system is also a vital aspect of their way of life. Male gametes are free-swimming sperm cells formed by reproductive structures called antheridia that require water to transport to female gametes, which are enclosed inside structures called archegonia. Because of their need for water, bryophytes thrive in wet environments including bogs.
So, option D is correct.
Bryophytes lack vascular tissue, but it has not evolved before the land plant.
So, option E is incorrect.

So, option D is the correct answer.

Additional Information:
Bryology, the branch of plant science concerned with the study of mosses, liverworts, and hornworts, is the subject of "Bryophytes." It includes information on these plants' classification, structural characteristics, natural history, ecology, and evolutionary relationships. Despite their small size, bryophytes play an important role in a variety of terrestrial ecosystems. They can be found on dirt, rocks, and/or trees all over the world.

Non-vascular seedless plants, also known as bryophytes, are the nearest living relatives of early terrestrial Crop plants, which are well suited to arid land environments, make up most terrestrial plants today. Green algae, seedless nonvascular plants, and seedless vascular plants are the three major categories of seedless plants.