In addition to having simple vascular tissue, seedless...

Name: Problem 6, Chapter 28: Biology: The Dynamic Science
Uploaded: 2021-07-29T01:55:22-08:00
Duration: 1 min 59 s
Channel: Joanna Quigley
Description: In addition to having simple vascular tissue, seedless vascular plants differ from all bryophytes in that: a. they do not require free water for fertilization. b. the sporophyte generation is dominant. c. most do not require a moist, humid, or shaded habitat. d. the group is much more diverse, with many more species overall. e. most have a feathery or flattened thallus.

In addition to having simple vascular tissue, seedless vascular plants differ from all bryophytes in that: a. they do not require free water for fertilization. b. the sporophyte generation is dominant. c. most do not require a moist, humid, or shaded habitat. d. the group is much more diverse, with many more species overall. e. most have a feathery or flattened thallus.

In addition to having simple vascular tissue, seedless vascular plants differ from all bryophytes in that:
a. they do not require free water for fertilization.
b. the sporophyte generation is dominant.
c. most do not require a moist, humid, or shaded habitat.
d. the group is much more diverse, with many more species overall.
e. most have a feathery or flattened thallus.

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Key Concepts

Vascular Tissue

Vascular tissue consists of specialized conducting cells (xylem and phloem) that enable the transport of water, nutrients, and sugars throughout the plant. This tissue is a key adaptation in vascular plants, allowing them to grow larger and inhabit drier environments compared to nonvascular plants.

Alternation of Generations

Alternation of generations is a reproductive cycle in plants that alternates between a multicellular haploid phase (gametophyte) and a multicellular diploid phase (sporophyte). In many vascular plants, the sporophyte is the dominant, long-lived phase, contrasting with bryophytes where the gametophyte predominates.

Water Requirement for Fertilization

Fertilization in many nonvascular plants, such as bryophytes, relies on free water to enable the motile sperm to reach the egg. Seedless vascular plants have evolved features that reduce or eliminate the absolute dependence on water for fertilization, thereby expanding their habitable range.

Adaptations to Terrestrial Environments

Adaptations such as vascular tissue and modifications in reproductive strategies have enabled vascular plants to colonize a wide range of terrestrial habitats, including areas that are less moist or humid. These evolutionary changes contrast with the typically moisture-dependent lifestyles of bryophytes.

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