BSsqans-lect23-24 dinosbirds

BSsqans-lect23-24 dinosbirds - BIS 1B (Winter 2008) Study...

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BIS 1B (Winter 2008) Study question answers: Dinosaurs and Birds Lecture 23-24 1. Explain how the wings of an albatross and the wings of a sparrow are each adapted to the bird's mode of life. The principal difference here is in the aspect ratio or the wing length divided by width. The albatross has a high aspect ratio (long narrow wings for maximum soaring efficiency) and thus can remain aloft with a minimum of energy expended. The humming bird has a low aspect ratio better for powered flight, hovering and delicate maneuvering necessary to avoid predators and to acquire nectar from flowers. 2. How many different adaptations for flight can you think of for birds? How many adaptations can you think of for swimming in fish? Birds/ flight: powerful breast muscles, feathers, light skeleton, hollow bones, heavy parts at center of gravity, less weight at the extremities, light skulls, no teeth, no heavy jaw musculature, a gizzard, and a light, thin skin. Fishes/ swimming: fusiform body, smooth surface, slime, lateral
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This note was uploaded on 04/07/2010 for the course BIS 2 taught by Professor Schwartzandkeen during the Fall '09 term at UC Davis.

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BSsqans-lect23-24 dinosbirds - BIS 1B (Winter 2008) Study...

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