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Marine Test 11-20-14
Module 7 test
| Question | Answer |
|---|---|
| Adaptation | An expression of a helpful trait coming directly from genetic information already possessed by at least some individuals in a genetically diverse population |
| Baleen | Rows of comb-like horny plates that project from the upper jaws of filter-feeding whales |
| Echolocation | method of analyzing sound waves to locate objects in the water column |
| Behavior | An activity an organism would do in its natural habitat |
| Delayed implantation | A delay in implantation of an embryo into the uterus, allowing for the proper timing of birth |
| Relationshop between sea turtle eggs hatching and predatory birds | the turtles lay a ton of eggs with the idea that very few will survive because of the predatory birds |
| Function of a salt gland | Removes excess salt out of the body ex: sea turtles |
| What does a laterally flattened tail help sea snakes etc. do? | aids them in swimming |
| Where are you more likely to find a marine reptile? In warmer or colder climates? | In warmer climates because they are ectothermic which means they cannot control their body temperature |
| pelicans vs. turns - why are they better swimmers? | they have webbed feet on their entire foot |
| A jawbone is found on a beach, is it a baleen whale or a toothed whale? How can you tell which one? | Does the jawbone have teeth or not |
| Whales are the biggest creatures in the world but it eats one of the most smallest organisms in the world. Why? | Their food size is small but they are filter feeders and can eat continuous |
| What are the difference between sirenia, carnivora, and pinnipedia? Where they spend the majority of their lives | Sirenia live in warm, shallow, marine, and fresh water and include manatees, sea cows; Carnivora spend much of their time swimming but can live on land and include sea otters, polar bears; Pinnipedia live on rocky shorelines and include seals, sea lions; |
| Description of echolocation | starts by moving air out of its blowhole. Air sac muscles make the clicks. The nasal plugs controls pressure while sound is being made, & the melon focuses & directs the clicks. Lower jaw receives clicks & sends to inner ears, which sends signal to brain |
| Why do dolphins not get the bends and people do? | they increase their oxygen levels by exhaling as much air as possible at the waters surface, rib cage collapses, forcing air away from lungs so it cannot be dissolved into the blood. |
| Why don't migratory marine mammals experience delayed implantation? | because they can go to different places to reproduce, don't have to stay in one spot |
| Gestation period for a marine mammal? | the length of time an animal is pregnant; for most marine mammals it is 11 months |
| Details of cetacean birth, why don't the calves drown? | they are born tail first so the mother can lead them to the surface |
| what is the difference between a seal and a sea lion? | Seals differ from sea lions because they don't have external ears. They can also rotate their flippers in order to crawl on land. |
Created by:
a.allsup
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