EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 27, Problem 4Q
Summary Introduction
To review:
The time and the geological period when the last common ancestor of embryophytes lived, and also the significant change in the life history that had occurred in this lineage.
Given:
Figure 1 shows the geological timescale of the origin of various embryophytes (land plants) including ferns and seed plants.
Figure 1: The geological timescale of the origin of various embryophytes.
Introduction:
Land plants are sometimes referred to as ‘Embryophytes’ because these plants develop from embryos protected by parental tissue. These plants generally arose from the aquatic green algal ancestor that is found linked with today’s stonewort.
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- which plant family often has a basal rosette of leaves and a well-developed hypanthium?arrow_forwardThe non-vascular plants are represented today by three phyla of small herbaceous plants namely: Phylum Hepatophyta, Phylum Anthocerophyta, and Phylum Bryophyta. Cite and explain how the structure fits function in bryophytesarrow_forwardIdentify four derived traits that distinguish plants from charophyte green algae and facilitate life on land. Explain.arrow_forward
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- Which two structures evolved though a series of changes in the reproductive biology among some heterosporous plants during the late Devonian period allowed spermatophytes (seed plants) to reduce or eliminate their dependence on water for gamete fertilization and development of the embryo and allowed them to colonize a much wider range of habitats?arrow_forwardWhat is the evolutionaryimportance of pteridophytes?arrow_forwardAre mosses a direct ancestor of flowering plants? Explain.arrow_forward
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