The chances of coexistence/occurrence of fossils of spike moss and related members of last common ancestor of seed plants and ferns in the same geological strata. In case, these plants do not exist in the same strata, give the name of strata (lower or higher than that of the spike moss) where the last common ancestor of seed plants and ferns would occur. Introduction: Spike mosses usually have a tropical distribution and mainly grow in moist-shaded habitats. A few spike mosses are found in deserts. Some of the species of a group of lycophytes called spike mosses are popular for cultivation. They are perennial, terrestrial or annual plants, which lack true roots. The spike mosses belong to a single genus, Selaginella .

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Chapter 27, Problem 2Q

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The chances of coexistence/occurrence of fossils of spike moss and related members of last common ancestor of seed plants and ferns in the same geological strata. In case, these plants do not exist in the same strata, give the name of strata (lower or higher than that of the spike moss) where the last common ancestor of seed plants and ferns would occur.

Introduction:

Spike mosses usually have a tropical distribution and mainly grow in moist-shaded habitats. A few spike mosses are found in deserts. Some of the species of a group of lycophytes called spike mosses are popular for cultivation. They are perennial, terrestrial or annual plants, which lack true roots. The spike mosses belong to a single genus, Selaginella.

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