Biology
Biology, 22.08.2019 22:30, help26852

In which of the following periods of the paleozoic era did the first vascular plants appear on land?
a. silurian
b. permian
c. cambrian
d. ordovician

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Biology, 01.07.2019 12:30, cristabean87
Plz 50 points 1. the organisms that died off in the greatest mass extinction in earth history all died within days or weeks. true false 2. tetrapods are two-legged animals. true false 3. trilobites were shallow marine animals that flourished during the lower paleozoic. true false 4. paleontologists agree that the burgess shale fossils can all be classified into modern groups of organisms. true false 5. the cambrian saw a tremendous diversification in life forms in part because the extent of shallow seas opened up many marine habitats marine regressions opened up many habitats on land competition with the ediacara fauna caused rapid evolution of cambrian organisms all of these 6. simple plants lacking vascular tissue, like mosses, began to colonize land during the period. ordovician paleozoic mesozoic permian 7. the permian mass extinction, which occurred 250 million years ago, extinguished percent of marine species. 20 75 10 95 8. name the kind of animal groups which existed during the paleozoic era. amphibians invertebrates reptiles all of the above 9. the permian extinction is believed to have taken place in separate parts. 3 4 6 5 10. for land plants to flourish needed to evolve. flowers puddles of water insects seeds
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Chemistry, 05.10.2019 14:20, paracordcms
Some land plants have evolved specialized vascular tissues that have allowed them to thrive on land. the developement of these structures was necessary because land plants need to extract water from the ground and move it to the other structures of the plant. land plants need to be tall and the vascular tissues are what provide rigidity to the plant’s cells. land plants need to photosynthesize and the vascular tissues is where this process occurs. land plants don’t really need these structures as they can absorb water from the air through their leaves.
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Computers and Technology, 23.10.2019 18:00, redrocker
Part 1; using css: geologic time is divided into eras, periods, and epochs. the eras and their periods are: proterozoic: (none) paleozoic: cambrian, ordovician, silurian, devonian, mississippian, pennsylvanian, and permian mesozoic: triassic, jurassic, and cretaceous. cenozoic: paleogene and neogene. only the paleogene and neogene periods are divided into epochs. they are: paleogene: paleocene, eocene, and oligocene neogene: miocene, plioce
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In which of the following periods of the paleozoic era did the first vascular plants appear on land?...

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