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View Resource What a Couple of Dimensions Can Do For You: Comparative Developmental Studies Using 4D Microscopy, Examples from Tardigrade Development

This Integrative and Comparative Biology scholarly paper (11-page PDF) presents a sophisticated method of microscopy, 4D microscopy (3D time-lapse microscopy), which records the entire development of an embryo and allows detailed analyses of events such as cleavage, cell migration, cell death (apoptosis), and cell differentiation during development. Using tardigrade development as an example,...

View Resource Protist Image Data

Protist Image Data (PID) is an online database that provides pictures and short descriptions of selected Protist genera, especially those genera whose species are frequently used as experimental organisms or are important in studies of organismal evolution. Up-to-date information is provided on the morphology, taxonomy and phylogenetic relationships of these organisms. Information on PID pages...

View Resource Phylogenetic Characterization of the Bacterial Assemblage Associated with Mucous Secretions of the Hydrothermal Vent Polychaete Paralvinella Palmiformis

This FEMS Microbiology Ecology journal article features a culture-independent molecular analysis of the bacterial assemblage associated with mucous secretions of the Northeastern Pacific vent polychaete Paralvinella palmiformis. It reports the presence of Verrucomicrobia, Fusobacteria and green non-sulfur bacteria on hydrothermal edifices. The potential functions of the detected bacteria are...

View Resource Phylogenetic Analysis of the Hyperthermophilic Pink Filament Community in Octopus Spring, Yellowstone National Park

This journal article reports the molecular phylogenetic approach used to analyze a microbial community associated with the 84 to 88 degrees C outflow from Octopus Spring. The authors perform techniques such as microscopy, DNA extraction and amplification, cloning and sequence analysis of 16S rRNA genes, phylogenetic analysis, and in situ hybridization to determine the limited phylogenetic...

View Resource Macroevolution: Patterns, Trends, and Rates of Change

In this lesson, students will learn that some evolutionary change is rapid and discontinuous, and some change is gradual; how fossil evidence can provide clues to the past; and how speciation may account for evolutionary branching and diversification. Fossil shells of a land snail are arranged by layers of age into a sequence pattern suggesting gradual change, or punctuated equilibria. Students...

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