What was the species Cooksonia, when did it appear in the fossil record, and why is...
What was the species Cooksonia, when did it appear in the fossil record, and why is it significant in regards to evolution?
Homework Answers
Cooksonia has a height of 6.5 cm and is a vascular plant and has fossilised better than other plant forms which were soft. .It appeared in the fossil record in the late ordovician and early silurian period.It is significant in regard to the evolution because these were the first early tracheophytes consisiting of true vascular tissues.They consist of horizontal stem with root hair like structures.They splitted from liverworts, mosses and hornworts which do not have vascular tissue.Cooksonia consist of multiple sporangia per sporophyte called polysporangiophyta as compared to single sporangia per sporophyte in earlier liverworts,hornworts and mosses.
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What was the species Cooksonia, when did it appear in the fossil
record, and why is...
What was the first vertebrate species and when did it appear in the fossil record? What...
What was the first vertebrate species and when did it appear in the fossil record? What were some of these vertebrates covered with?
By definition, our knowledge of the fossil record will always be incomplete, but this does not...
By definition, our knowledge of the fossil record will always be incomplete, but this does not mean that scientists are unable to test hypotheses regarding the evolution of our own and other species. Summarize the process (and often fortuitous suite of factors) by which an organism’s remains become fossilized. What other post-depositional factors influence fossil discoveries and our knowledge of the fossil record?
shark appears in the fossil record approximately 400 million years ago, whereas fields appear approximately 25...
shark appears in the fossil record approximately 400 million years ago, whereas fields appear approximately 25 years ago. Compare and contrast the digestive of the digestive features of these hypercarnivores (diet > 75% meat) separated by 375 my of evolution
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Someone comes to you and states that because there are gaps in the record for species "A" this shows that evolution is not true. How do you argue against this statement? In other words how do you argue in favor of evolution when gaps are present? Or do these gaps invalidate evolution? Restrict your discussion to the fossil record only. Please be detailed
Consider the following: a. The first arthropods to appear in the fossil record are marine crustaceans...
Consider the following: a. The first arthropods to appear in the fossil record are marine crustaceans and trilobites. b. terrestrial insects appeared relatively late in arthropod evolution. c. although most crustaceans are aquatic, the crustacean groups called crabs and isopods each include both aquatic and terrestrial forms, and d. analyses of DNA sequence data suggest that crustaceans and insects are closely related. Based on these observations, do you agree or disagree with the hypothesis that arthropods made the water-to-land...
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What conditions are best for fossil formation? Name organisms that are well represented in the fossil record Why are these types of organisms more prevalent in the fossil record? Discuss the following: Pangaea Laurasia Gondwana What organism is the major force driving evolution today?
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A paleontologist identified two distinct species of mollusks in the fossil record of a region. In...
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Anatomical adaptations for bipedalism are present in the fossil record before there is an increase in...
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Consider lineages, such as our own, for which the fossil record is fragmentary and incomplete. What...
Consider lineages, such as our own, for which the fossil record is fragmentary and incomplete. What disadvantages does this confer upon scientists trying to fathom the history of our species? What useful things can be learned from one or a few fragments of bone?
What conditions are best for fossil formation? Name organisms that are well represented in the fossil record Why are these types of organisms more prevalent in the fossil record? Discuss the following: Pangaea Laurasia Gondwana What organism is the major force driving evolution today?
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