Tag

Evolutionary Strategy

All articles tagged with #evolutionary strategy

2024 Cicada Invasion: What to Expect and Where
environment2 years ago

2024 Cicada Invasion: What to Expect and Where

Billions, if not trillions, of cicadas from two different broods, Brood XIII and Brood XIX, are set to emerge in the Eastern half of the United States this spring, a rare event that last occurred in 1803. These insects, known for their 17- and 13-year cycles, employ an evolutionary strategy of mass emergence to overwhelm their predators. Their synchronized emergence is likely an adaptation to ensure their survival, as their predators cannot consume all of them at once. This year's emergence will be concentrated in Northern Illinois and the Southeastern states, with the cicadas expected to number in the billions due to the simultaneous awakening of the two broods.

Self-Destructive Cells: Guardians of the Genome
science3 years ago

Self-Destructive Cells: Guardians of the Genome

Researchers have discovered instances of programmed DNA elimination (PDE) in various species, where organisms purposefully eliminate portions of their genome. PDE has been observed in about 100 species, including worms, parasites, insects, and songbirds. In a recent study, scientists found that a nematode worm eliminated one-third of its genome, specifically targeting repetitive stretches of DNA that do not contribute to its survival. This suggests that PDE may be a mechanism to combat genetic parasites, such as transposons. Additionally, PDE may help streamline genomes and improve efficiency in different life stages. The prevalence and reasons for PDE are still not fully understood, but researchers believe it may be more widespread than currently known.