Help
Options
Question
Why are sessile benthic (bottom-attached) plants only common in the near-shore zone and continental shelves?
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Question
Why are most coral reefs found in shallow water?
Remaining cards (42)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Oceanography quiz 7
| Question | Answer |
|---|---|
| Why are sessile benthic (bottom-attached) plants only common in the near-shore zone and continental shelves? | light can penetrate all the way to the seafloor on the shelves |
| Why are most coral reefs found in shallow water? | the coral polyps need plentiful light so their zooxanthellae can perform photosynthesis |
| Which of the following is an evolutionary adaptation made by most marine mammals to live in the marine environment? | thick insulation to conserve internal heat |
| In the figure below, the cockle (left) has a siphon that reaches up into the water, which allows it to breathe and to feed. What type of feeding strategy is this? Two organisms that live on sedimented shores: (a) cockle (bivalve) and (b) lugworm. | suspension feeding |
| In the coral disease known as “coral bleaching”, what causes the bleaching? | the corals expel the zooxanthellae that normally give them color |
| Marine mammals have all of the following characteristics, except for one. Which one is NOT a characteristic of marine mammals | they have a keen sense of smell |
| All of the following, except one, are adaptations for deep-sea fish. Which one is not? | large bodies |
| Why is species diversity (i.e., the number of different species) high on rocky coasts as compared with sedimented coasts? | Rocky coasts have more varied substrates and hence more ecological niches or organisms to develop special adaptations |
| Dinoflagellates sometimes reproduce in such large numbers that they color surface waters red and these are called “red tides” (although they have nothing to do with tides). Not all blooms of toxic dinoflagellates discolor the water, so oceanographers pref | harmful algal blooms (HAB) |
| Many plankton are tiny, single-cell organisms. Why is this small size advantageous for them? | All of the above |
| Which of the following groups does the “Portuguese man-o-war” (Physalia) belong to? | cnidarians |
| Benthic organisms are sometimes classified as either infauna or epifauna. What is the difference? | infauna live within the sediments whereas epifauna live on the surface of the sea bottom |
| What is the difference between phytoplankton and zooplankton? | phytoplankton photosynthesize and zooplankton do not |
| Most invertebrates and fish of the pelagic realm use oviparous reproduction. What does that mean? | they lay a lot of eggs and do not care for them |
| As a group, deep-water nekton are known to exhibit all of the following adaptations EXCEPT ______. | Bright, colorful bodies |
| What are chemosynthetic organisms? | organisms that produce their own energy and organic matter through chemical reactions |
| The figure below shows a shrimp-like, planktonic organism that is found in abundance around Antarctica and is the favorite food of many baleen whales. What is its name? | krill |
| Why does the distribution of benthic biomass mimic the distribution of surface water biomass? | benthic biomass is controlled by the supply of detritus from the surface |
| When a fishery is overfished, the baby fish are not replaced in sufficient numbers to replace the harvested fish, and the population declines. Oceanographers express this as the maximum fish biomass that can be removed from the ecosystem yearly before dec | maximum sustainable yield |
| Why do sharks have asymmetric, heterocercal tail fins? | this type of fin gives them lift to keep them from sinking |
| Of the following groups, which one is highly skilled in the ability to use echolocation for navigation and communication? | Odontoceti |
| Why are most deep-sea fish generally small and sluggish? | food is scarce in deep water, favoring a less energetic lifestyle |
| Which of the following organisms is not considered to a cetacean (member of the order Cetacea)? | seals and sea lions (pinnipeds) |
| Which of the following is NOT a characteristic exhibited by marine mammals? | Marine mammals have gills |
| Of the following statements, which one best describes copepods? | Copepods and microscopic shrimp-like animals that are a vital link a many marine food webs |
| A nektonic organism must ______. | be a strong swimmer |
| Which of the following conditions is a requirement of coral reefs? | water warmer than 18 degrees Celcius |
| The figure above shows two organisms that live on sedimented shores. Both do something (a behavior) that is a common adaptation for life on sedimented shores. What is it? | burrowing |
| Which of the following whales do not have baleen? | sperm whales |
| Unlike humans, whales can minimize the debilitating effect of deep dives because they ______. | They have collapsible lungs |
| Corals are colonial animals that secrete a carbonate skeleton. Individual corals are called what? | polyp |
| The figure below shows some odd-looking fish. They have features such as big mouths, hinged jaws, bioluminescent lures, and upward-looking eyes. Where would you find such fish? | near the bottom of the deep ocean |
| Chemosynthetic organisms occur in the Gulf of Mexico at what locations? | oil seeps |
| Of the following, which one is believed to be the MOST important function of schooling? | It offers protection from predators. |
| Whales fall into two categories: | those with teeth and those with baleen |
| Microscopic algae are important in the marine environment. Which one of the following statements about them is NOT true? | they filter seawater and remove pollutants |
| What is a bycatch? | unwanted marine organisms caught incidentally during fishing |
| If someone brought you an organism washed up on the beach along a rocky shore coastline and it consisted of soft body parts, what would be your conclusion about the zone in which it lives? | low tide zone |
| Of the following fin types, which one is most commonly used to propel a fish forward? | caudal fin |
| Hunter-cruiser fish often have body temperatures that are higher than the surrounding water. Why? | it increases the power output of muscles |
| Which of the following statements about symbiosis is FALSE? | Cannibalism is a type of symbiosis in which one party gets eaten. |
| In temperate ocean waters, the spring phytoplankton bloom occurs as a spike in phytoplankton numbers during the spring. What is the main reason why the number of primary producers falls rapidly after the bloom? | because of a strong thermocline nutrients for growth become depleted in surface waters and zooplankton eat the phytoplankton |
| Which of the following is NOT a common method that pelagic organisms use to maintain their vertical position in the water (i.e., float)? | big air-filled bones |
Created by:
Sarahk7