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What’s the Difference Between Angiosperms
and Gymnosperms? Do Plants Have Sexes? Do Plants Emit Oxygen and Carbon Dioxide at Night?
Vascular plants (tracheophytes) differ from the nonvascular bryophytes in that
they possess specialized supporting and water-conducting tissue, known as xylem, and meals-conducting tissue, referred to as phloem.
The xylem is composed of nonliving cells (tracheids and
vessel elements) which can be stiffened by
the presence of lignin, a hardening substance that reinforces the cellulose
cell wall. The living sieve parts that comprise the phloem are not lignified.
Xylem and phloem are collectively known as vascular tissue and
type a central column (stele) by means of the plant
axis. The ferns, gymnosperms, and flowering plants are all vascular plants.
Because they possess vascular tissues, these plants have true stems, leaves, and roots.
Before the development of vascular tissues, the only plants of considerable measurement existed in aquatic environments
where help and water conduction weren't crucial. A second main difference between the vascular plants
and bryophytes is that the bigger, more conspicuous technology amongst
vascular plants is the sporophytic part of the life cycle.