Exam1Key - YOUR NAME:_ Ornithology ECOL484 spring 2007 Exam...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
YOUR NAME:____________________________________ Ornithology ECOL484 spring 2007 Exam #1 1. (16 points) . Match the following words with the phrase/concept that it MOST CLOSELY relates to in the list below. Concepts may match more than one term or match none of the terms. ____ Bergman’s rule ____ WAIR ____ Great American Faunal Interchange ____ ossification ____ molecular clock ____ carotenoids ____ supracoracoideus ____ phylogenetically independent contrasts a) example of the Bernoulli principle b) helps identify the timing of diversification of modern birds c) relates to the pineal gland and changes in daylength d) a pulley-like mechanism for lifting wing e) property of bird that relates to temperature regulation via evaporative cooling f) involved in digestion of vegetative matter by Hoatzins g) one of the differences between hatchling altricial and precocial chicks i) hummingbirds expand their distribution into N. temperate zone j) control for “relatedness” when comparing traits of species k) sheds light on how flight may have evolved l) added by females to the ovum in the follicle 2. (4 points) Explain the tradeoff a bird must make between synchronous hatching of all its eggs and having a large clutch. What physiological factor(s) account for this and how might that tradeoff be influenced by what climate the bird nests in? e k i g b l d j 20 1 egg/day, incubation starts development. If a bird delays too long in initiating incubation while laying more eggs, the eggs are more likely to spoil or not develop properly. But initiating before clutch is complete leads to differences in chick size that often result in death of youngest chicks. development happens between narrow range of temps (below devel zero, no devel, above 40 proteins denature), high temps Æ some devel (less synchrony) but more spoiling, low temps Æ longer shelf life, increases devel time, could potentially have large clutches.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
YOUR NAME:____________________________________ Ornithology ECOL484 spring 2007 3. (4 points). Circle the answer, true or false, that is more correct. Phenotypic plasticity is a property of an animal’s genotype a) TRUE FALSE In North America, most species of thrush (Turdidae) belong to the “ Catharus ” clades or the “ Turdus ” clades. Based on the phylogeny presented at the right (Klicka et al. 2005), these two clades are believed to be sister taxa. b)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

Exam1Key - YOUR NAME:_ Ornithology ECOL484 spring 2007 Exam...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online