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eukaryotes

Video of two slipper-shaped paramecia engaged in a sexual process called conjugation.
evolution

Why Sex? Biologists Find New Explanations.

April 23, 2020

Why did sex evolve? Theories usually focus on the diversity of future generations, but some researchers find compelling explanations in the immediate benefits to individuals.

A split level photo shows algae growing on rocks both above and below the surface of the water at a margin of a Welsh glacial lake.
Abstractions blog

Billion-Year-Old Algae and Newer Genes Hint at Land Plants’ Origin

March 26, 2020

A recently unearthed fossil and new genomic discoveries are filling important gaps in scientists’ understanding of how primitive green algae eventually evolved into land vegetation.

Art for "Dormant Microbes Bide Their Time Over Decades - Old Fires"
ecology

Heat-Loving Microbes, Once Dormant, Thrive Over Decades-Old Fire

April 16, 2019

In harsh ecosystems around the world, microbiologists are finding evidence that “microbial seed banks” protect biodiversity from changing conditions.

Art for "Researchers Rethink Ancestry of Complex Cells"
evolution

Researchers Rethink the Ancestry of Complex Cells

April 9, 2019

New studies revise ideas about the symbiosis that gave mitochondria to cells and about whether the last common ancestor of all eukaryotes was one cell or many.

Art for "Mitochondria Direct the Fate of Stem Cells by Shape-Shifting"
developmental biology

Biologists Discover Unknown Powers in Mighty Mitochondria

March 18, 2019

Mitochondria are most famous as sources of metabolic energy. But by splitting and combining, they can also release chemical signals to regulate cell activities, including the generation of neurons.

Abstractions blog

What a Newfound Kingdom Means for the Tree of Life

December 11, 2018

Neither animal, plant, fungus nor familiar protozoan, a strange microbe that sits in its own “supra-kingdom” of life foretells incredible biodiversity yet to be discovered by new sequencing technologies.

genetics

Tiny Genomes and the Origin of Complex Cells

June 20, 2013

Symbiotic bacteria that dwell within insect cells are intricately intertwined with their hosts, prompting scientists to question when these bacteria stop being bona fide organisms and become part of the cell.