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tag crime scene evolution ecology cell molecular biology

The structure of a biological cell (macro)
The Long and Winding Road to Eukaryotic Cells
Amanda Heidt | Oct 17, 2022 | 10+ min read
Despite recent advances in the study of eukaryogenesis, much remains unresolved about the origin and evolution of the most complex domain of life.
Forensics Fights Crimes Against Wildlife
Steve Bunk | Apr 2, 2000 | 7 min read
Courtesy of National Fish and Wildlife Forensics Lab.A collection of confiscated and/or donated skins, trophies, and fur coats at the National Fish and Wildlife Forensics Laboratory. Try suggesting to Ed Espinoza that in forensic sciences, wildlife work is the poor sister. The deputy director of the National Fish and Wildlife Forensics Laboratory in Ashland, Ore., may mention something about anthropomorphism, followed by comparative statistics on populations of walruses and small towns, or the n
a microscope image of a rotifer
Bacterial Enzyme Keeps Rotifers’ Transposable Elements in Check
Christie Wilcox, PhD | Mar 3, 2022 | 5 min read
Jumping genes in bdelloid rotifers are tamped down by DNA methylation performed by an enzyme pilfered from bacteria roughly 60 million years ago, a study finds.
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.
A C-fern (Ceratopteris richardii) growing in a pot
Genome Spotlight: C-fern (Ceratopteris richardii)
Christie Wilcox, PhD | Sep 22, 2022 | 5 min read
Sequences for the model organism and two of its kin reveal how these plants got their oversized genomes.
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
Of Sheep and Grapes: DNA Fingerprinting Tracks Ancestry
Ricki Lewis | Sep 26, 1999 | 5 min read
Since the mid-1980s, variations on the DNA fingerprinting theme have left their marks on diverse fields. By comparing distinctive DNA sequences, aberrations, or numbers of repeats among individuals, investigators have matched suspects to crime scenes and parents to offspring; assembled body parts in the aftermath of disasters; identified kidnap victims, Thomas Jefferson's son, and the remains of Tsar Nicholas' family, who were executed in 1918; and exonerated 64 prisoners, including nine on dea
Life With Selfish Genes: The Evolution Of Richard Dawkins
Bernard Dixon | Nov 27, 1988 | 9 min read
On the other hand, Dawkins’ forays into the popularization of evolutionary processes also made the zoologist the target of creationists and even a few biologists. In particular, his critics argue that if the gene is indeed “selfish”—that is, more important than the individual or the group in determining patterns of evolution—then what happens to such cherished driving forces as “the good of the species”? In addition, Dawkins’s insistence on the
PCR Primed To Spur Chain Of Applications
Holly Ahern | Jun 25, 1995 | 10+ min read
What would you do if your research interests revolved around obtaining DNA from a bacterium preserved for millions of years in the gut of a bee stuck in amber, matching up a murderer to crime- scene blood half a century old, or cloning genes from a 1,000- year-old mummy? Most scientists would first consider PCR--the polymerase chain reaction--as a technique for approaching problems such as these. With PCR, minute quantities of nucleic acids can be amplified millions of times into sufficient qua
An Offensive Playbook
Mary Beth Aberlin | Feb 1, 2014 | 3 min read
Developing nonaddictive drugs to combat pain

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