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15 Cards in this Set
- Front
- Back
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When did the origin of land plants from aquatic ancestors occur?
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The Paleozoic era about 430 million years ago.
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Most botanists agree that what, similar to certain multicellular green algae were probably forerunners for today's plant life?
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Photosynthetic protists.
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What were the first adaptations for plants?
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A cuticle and a protective covering for the gametes and embryos of the plant.
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How many distinct groups of early plants emerged during the Paleozoic Era?
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Two.
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What type of plants have vascular tissue?
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Vascular plants.
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In vascular plants, what transported water and nutrients throughout the plant?
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Cells joined into tubes.
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Vascular plants were the ancestors of all plants but what?
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Mosses and their relatives.
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Vascular tissue did not evolve in what?
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The second group of plants from the Paleozoic Era.
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The nonvascular plants from the Paleozoic Era were the ancestors of what?
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Mosses and their relatives.
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The soil provides water and minerals but what is missing?
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There is no light underground for photosynthesis.
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What is the body of a vascular plant differentiated into?
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A root system and an aerial system of stems and leaves.
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Roots that absorb water accross their surface generally lacks what?
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A waxy cuticle that limits water evaporation in stems and leaves.
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What increases the surface area of the roots in contact with water?
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Root hairs.
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All vascular plants have lignin, what is it.
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A hard material embedded in the cellulose matrix of the cell walls.
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What does lignin provide?
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The needed support for trees and other large vascular plants.
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