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The differences between the bird and human skeleton are very apparent in the pectoral girdle, which is the place where the forelimbs attach to the spine. The bird's forelimbs are wings and must have a strong support system. The collarbone of the bird is fused to form the furculum, or wishbone.
BIOLOGY Edexcel (9-1) Student Book Answers - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Scribd is the world's largest social reading and publishing site.
What is a cladogram? It is a diagram that depicts evolutionary relationships among groups. It is based on PHYLOGENY, which is the study of evolutionary relationships. Sometimes a cladogram is called a phylogenetic tree (though technically, there are minor differences between the two).
Biologically, one could use anatomical features, behavior, or molecular similarities and differences in constructing a cladogram. Molecularly, one could look at the number of mutations in a common strand of DNA. Another way would be to compare strings of amino acids and note differences in the order of the amino acids.
OVERVIEW. In this activity, students analyze aspects of a scientific paper that investigates genes involved in the colors and patterns of butterfly wings. This paper shows how evolutionary biologist Robert Reed and his colleagues used the biotechnology tool CRISPR-Cas9 to inactivate a number of butterfly genes and determine their functions.
How much do you know about bird anatomy? Test yourself with an interactive reference guide to all the important anatomical systems in a bird.
1 wrz 2000 · A comprehensive overview of the functional morphology of insect wings from the viewpoint of general biology. Dmitry L. Grodnitsky uses these data to help further explain animal morphology.
