Term
| Birds are closely related to which group of animals (how)? |
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Definition
| Reptiles; have scaled legs |
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Term
| What is the most significant feature of birds? |
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Definition
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Term
| What are two functions of feathers? |
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Definition
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Term
| What are the two types of feathers? |
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Definition
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Term
| What are two similarities between birds and reptiles? |
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Definition
1. Amniotic egg
2. Excrete uric acid |
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Term
| What is Archaeopteryx and its significance? |
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Definition
| First birdlike fossil discovered that suggests that birds evolved from dinosaurs, as it has characteristics of both birds and reptiles. |
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Term
| What are three adaptations which have allowed birds to fly? |
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Definition
1. Feathers that are arched on wings
2. Strong, lightweight [hollow] bones
3. Powerful chest muscles |
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Term
| What two things do birds devote most of their energy to? |
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Definition
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Term
| Birds are endotherms. What does that mean? |
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Definition
| They have a high rate of metabolism and can produce their own body heat (warmblooded). |
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Term
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Definition
| Area where food is stored and moistened before moving further in the digestive tract |
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Term
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Definition
| Part of the stomach that grinds food together; only in seed/insect eating birds |
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Term
| Describe avian respiration. |
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Definition
| Oxygen rich air enters through trachea and into air sacs. Then it passes through tubes which absorb the gas. Birds have a one-way method of getting oxygen -- very efficient! |
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Term
| What does avian circulation consist of? |
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Definition
| There are two ventricles and atriums, one for oxygenized blood and vise versa. |
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Term
| What does the cerebrum control? |
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Definition
| Behaviors such as flying, nesting, and mating |
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Term
| What does the cerebellum control? |
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Definition
| Movements and coordination |
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Term
| What are a bird's best senses (why)? |
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Definition
Sight-large optic lobes
Touch-pulmid feathers |
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Term
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Definition
| The breastbone that is keeled and acts as an anchor to all the wing and chest muscles. |
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Term
| What gland makes feathers waterproof? |
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Definition
| Preen gland at base of tail |
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Term
| Why is a bird's wing arch shaped? |
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Definition
| Following Bernuli's principles, air travels faster over the top because it's curved, creating lift. |
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Term
| What special "ingredient" is in a bird eggshell (why)? |
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Definition
| Limestone gives the shell a hard covering. |
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Term
| What does altricial mean? |
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Definition
| Bird nests in trees; poorly developed; only a few eggs per clutch; dependent on mother; hatch quickly (short incubation) |
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Term
| What does precocial mean? |
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Definition
| Bird nests on ground; more advanced and developed; large clutches; long incubations |
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Term
Study the following parts of a feather:
[image] |
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Definition
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