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tag ice nucleator developmental biology evolution ecology

Individuality, Evolution, and Dancing
Ricki Lewis | Jun 12, 2005 | 3 min read
What is the unit of evolution, the level of life upon which natural selection acts? A geneticist would say the gene; Charles Darwin saw it in the unique populations on the Galapagos. On Friday, Leticia Aviles, associate professor of zoology at the University of British Columbia, singled out the individual as dividing the cellular from the group level. ?But what an individual is depends on one's frame of reference,? she said, and the level at which natural selection acts remains an unresolved is
Close up photo of a wing
Unearthing the Evolutionary Origins of Insect Wings
Jef Akst | Apr 4, 2022 | 6 min read
A handful of new studies moves the needle toward a consensus on the long-disputed question of whether insect wings evolved from legs or from the body wall, but the devil is in the details.
An illustration of green bacteria floating above neutral-colored intestinal villi
The Inside Guide: The Gut Microbiome’s Role in Host Evolution
Catherine Offord | Jul 1, 2021 | 10+ min read
Bacteria that live in the digestive tracts of animals may influence the adaptive trajectories of their hosts.
A pair of zebra finches in a cage
Animal Divorce: When and Why Pairs Break Up
Catherine Offord | Jun 1, 2022 | 10+ min read
Many species of birds and other vertebrates form pair bonds and mate with just one other individual for much of their lives. But the unions don’t always work out. Scientists want to know the underlying factors.
An Edith’s checkerspot butterfly
Genome Spotlight: Edith’s Checkerspot Butterfly (Euphydryas editha)
Christie Wilcox, PhD | Aug 25, 2022 | 3 min read
A high-quality genome sequence for this versatile insect will likely aid eco-evolutionary research.
The Genetics of Society
Claire Asher and Seirian Sumner | Jan 1, 2015 | 10 min read
Researchers aim to unravel the molecular mechanisms by which a single genotype gives rise to diverse castes in eusocial organisms.
Surpassing the Law of Averages
Jeffrey M. Perkel | Sep 1, 2009 | 7 min read
By Jeffrey M. Perkel Surpassing the Law of Averages How to expose the behaviors of genes, RNA, proteins, and metabolites in single cells. By necessity or convenience, almost everything we know about biochemistry and molecular biology derives from bulk behavior: From gene regulation to Michaelis-Menten kinetics, we understand biology in terms of what the “average” cell in a population does. But, as Jonathan Weissman of the University of Califo
Identifying Future Victims of Climate Change
Catherine Offord | Jul 1, 2018 | 10+ min read
Assessments of species vulnerability provide crucial information for conservation efforts. But the science behind them is still evolving.
Big Genes Are Back
Steve Bunk | Mar 17, 2002 | 7 min read
One more genomewide linkage map, this for a fish called the three-spined stickleback, was announced late last year to not much fanfare.1 But rather than just another stride in the march of genomics, the accomplishment heralded a new way to approach a question that has stumped evolutionary biologists for decades: What is the architecture of genetic change? The model organisms for which linkage maps have been created are often bred in the laboratory to express certain phenotypes, and they can reve
Polar Regions Offer Rich Opportunities For Research
Douglas Siegel-causey | Apr 26, 1998 | 7 min read
Polar science is receiving increased attention this spring with several new developments in the national and international arenas. At last month's meeting of the United States-Russian Joint Commission on Economics and Technological Cooperation, one of the major agenda items was Arctic sciences. This commission has met semiannually since it was initiated in 1993 by U.S. Vice President Al Gore and former Russian Prime Minister Viktor Chenomyrdin to establish new intergovernmental agreements for

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