www.sciencemag.org SCIENCE VOL 332 20 MAY 2011 885 COVER Phase contrast photomicrograph of a Schizosaccharomyces octosporus ascus, a sac-like cell that typically contains eight spores (each ~2 micrometers across). S. octosporus and other fi ssion yeasts are important models of eukaryote biology and have evolved a single-celled lifestyle independently from their budding yeast cousins. On page 93...

Since it is usually accepted that the more anaplastic bronchial carcinomas have a worse outlook, it might be thought that the type of cell found in a positive biopsy from bronchoscopy would give a clear lead as to prognosis. Indeed, Nicholson, Fox, and Bryce (1957) stated that the prognosis was best for squamous-celled growths and almost hopeless for spheroidal-celled, oatcelled, and anaplastic...

Diatoms contribute to a substantial portion of primary production in the oceans and many lakes. Owing to their relatively heavy cell walls and high nutrient requirements, planktonic diatoms are expected to decrease with climate warming because of reduced nutrient redistribution and increasing sinking velocities. Using a historical dataset, this study shows that diatoms were able to maintain the...

www.sciencemag.org SCIENCE VOL 332 20 MAY 2011 885 COVER Phase contrast photomicrograph of a Schizosaccharomyces octosporus ascus, a sac-like cell that typically contains eight spores (each ~2 micrometers across). S. octosporus and other fi ssion yeasts are important models of eukaryote biology and have evolved a single-celled lifestyle independently from their budding yeast cousins. On page 93...