Cannus stannous
This classroom activity highlights how evolution by natural selection is nonteleological—that is, not guided by need, by organismal intent, by inherent progress, by an external ideal, or by any observable purposive agent. Rather, it is driven by chance opportunity, environmental context, and histori...
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Language: | English |
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University of California Press
2022
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Online Access: | http://dx.doi.org/10.1525/abt.2022.84.2.88 https://online.ucpress.edu/abt/article-pdf/84/2/88/495078/abt.2022.84.2.88.pdf |
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crunicaliforniap:10.1525/abt.2022.84.2.88 2023-08-27T04:07:52+02:00 Cannus stannous Allchin, Douglas 2022 http://dx.doi.org/10.1525/abt.2022.84.2.88 https://online.ucpress.edu/abt/article-pdf/84/2/88/495078/abt.2022.84.2.88.pdf en eng University of California Press The American Biology Teacher volume 84, issue 2, page 88-93 ISSN 0002-7685 1938-4211 General Agricultural and Biological Sciences Agricultural and Biological Sciences (miscellaneous) Education journal-article 2022 crunicaliforniap https://doi.org/10.1525/abt.2022.84.2.88 2023-08-04T13:14:08Z This classroom activity highlights how evolution by natural selection is nonteleological—that is, not guided by need, by organismal intent, by inherent progress, by an external ideal, or by any observable purposive agent. Rather, it is driven by chance opportunity, environmental context, and historical happenstance. Students simulate the evolution of a population of tin cans, based on temperature retention/loss in either arctic or hot desert habitats. Chance and necessity interact in separate lab groups (as isolated populations), based on similar starting organisms. The process demonstrates not only selection but also how even organisms in similar environments may not evolve with identical traits, depending on available mutations. It shows that even when selection occurs, it may not do so consistently or uniformly with each generation. It shows both divergence based on different contexts of selection and variability based on the vagaries of history. Article in Journal/Newspaper Arctic University of California Press (via Crossref) Arctic The American Biology Teacher 84 2 88 93 |
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Open Polar |
collection |
University of California Press (via Crossref) |
op_collection_id |
crunicaliforniap |
language |
English |
topic |
General Agricultural and Biological Sciences Agricultural and Biological Sciences (miscellaneous) Education |
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General Agricultural and Biological Sciences Agricultural and Biological Sciences (miscellaneous) Education Allchin, Douglas Cannus stannous |
topic_facet |
General Agricultural and Biological Sciences Agricultural and Biological Sciences (miscellaneous) Education |
description |
This classroom activity highlights how evolution by natural selection is nonteleological—that is, not guided by need, by organismal intent, by inherent progress, by an external ideal, or by any observable purposive agent. Rather, it is driven by chance opportunity, environmental context, and historical happenstance. Students simulate the evolution of a population of tin cans, based on temperature retention/loss in either arctic or hot desert habitats. Chance and necessity interact in separate lab groups (as isolated populations), based on similar starting organisms. The process demonstrates not only selection but also how even organisms in similar environments may not evolve with identical traits, depending on available mutations. It shows that even when selection occurs, it may not do so consistently or uniformly with each generation. It shows both divergence based on different contexts of selection and variability based on the vagaries of history. |
format |
Article in Journal/Newspaper |
author |
Allchin, Douglas |
author_facet |
Allchin, Douglas |
author_sort |
Allchin, Douglas |
title |
Cannus stannous |
title_short |
Cannus stannous |
title_full |
Cannus stannous |
title_fullStr |
Cannus stannous |
title_full_unstemmed |
Cannus stannous |
title_sort |
cannus stannous |
publisher |
University of California Press |
publishDate |
2022 |
url |
http://dx.doi.org/10.1525/abt.2022.84.2.88 https://online.ucpress.edu/abt/article-pdf/84/2/88/495078/abt.2022.84.2.88.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
The American Biology Teacher volume 84, issue 2, page 88-93 ISSN 0002-7685 1938-4211 |
op_doi |
https://doi.org/10.1525/abt.2022.84.2.88 |
container_title |
The American Biology Teacher |
container_volume |
84 |
container_issue |
2 |
container_start_page |
88 |
op_container_end_page |
93 |
_version_ |
1775348590566178816 |