GLY1102 Topic 9
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During the ______, angiosperms began overcoming non-flowering plants as the dominant land plants.
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Cretaceous Period
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The earliest vascular plants date back to the ______ Period.
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Silurian
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The ancient group of conifers known as Araucariaceae surfive today in natural habitat and are most common in this region of the world.
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The Southern Hemisphere
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High-browsing _____ declined markedly between the Late Jurassic and Early Cretaceous.
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Sauropods
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For most of Earth history, the land has been virtually void of all plant life.
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True
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_______ plants are those lacking specialized cells or the movement of nutrients and water.
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Non-vascular
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The elevation above which trees cannot grow because of snow and very cold temperatures is known as the ______.
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Tree line
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_______ are cone-bearing gymnosperms with seeds resting on the projecting scales of their cones.
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Conifers
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The first large forests of vascular plants filled wetlands during the _____ Period.
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Devonian
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Fossil fruit has never been in Mesozoic sedimentary rocks.
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False
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______ are seed-producing plants where the seed is exposed (not enclosed, e.g., woody scales of a pine cone).
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Gymnosperms
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All the modern conifer families were already members of the Early Mesozoic landscape.
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True
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Spores are produced in structures called _____ (e.g., the prominent brown spots on the underside of fern fronds).
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Sporangia
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Sphagnum or peat moss is an example of a ______.
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Bryophyte
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The angiosperm reproductive system is enhanced by insect pollination.
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True
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_____ grow in wet or damp areas often carpeting rocks and decaying wood on the forest floor.
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Sphagnum mosses
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Seed ferns are among the earliest speed-producing plants.
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True
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An ancient group of conifers is the family ______ that still grows today in the Southern Hemisphere.
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Araucariaceae
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This group of plants that was extinct except in Asia but later reintroduced to the rest of the world by man:
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Ginkgoes
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During the _____, angiosperms began overcoming the non-flowering plants as the dominant land plants.
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Cretaceous Period
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_______ are seedless, spore-producing, vascular plants whose reproductive system ties them to most environments.
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Ferns
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Ferns are ancient plants dating back long before dinosaurs.
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True
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Our solar system is about ________ years old.
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4.6 billion
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Simple non-vascular plants like _______ were among the earliest land plants.
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Bryophytes
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Seedless vascular plants were the earliest land plants.
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True
