The reason why the bryophytes remain small whereas pteridophytes can grow to great heights is because in pteridophytes:

Spores get discharged by the hygroscopic annulus

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True xylem and phloem are developed

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Photosynthesis occurs vigorously

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Numerous rhizoids are found

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Solution

The correct option is B True xylem and phloem are developed
Pteridophytes evolved a system of xylem and phloem to transport fluids and thus achieved greater heights than was possible for their avascular ancestors. This greater height gave them an evolutionary advantage because they were able to disperse spores better, which gives rise to new plants.

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Similar questions

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A plant shows thallus level; of organisation. It shows rhizoids and is haploid. It needs water to complete its life cycle because the male gametes are motile. Identify the group to whcih it belongs to

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