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1 | |
Of these intertidal habitats, which would be the most difficult to study? |
| | A) | wave-swept rocks at high tide |
| | B) | a deep pool at low tide |
| | C) | a muddy bay with low oxygen in the sediment |
| | D) | a flat sandy beach in a bay |
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2 | |
If a biologist wants to study the life of tide pools, he would be wise to visit which state? |
| | A) | Texas |
| | B) | Virginia |
| | C) | Washington |
| | D) | Vermont |
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3 | |
An example of sessile epifauna would be a |
| | A) | barnacle. |
| | B) | starfish. |
| | C) | periwinkle. |
| | D) | soft-shelled clam. |
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4 | |
Tide pools at the highest tide levels may be inhabited only by bacterial films. Why might this be so? |
| | A) | Grazing snails do not range into the highest tidal levels. |
| | B) | The animals of the upper intertidal zone cannot survive total emersion in seawater. |
| | C) | The water in the pools can evaporate, making the pools hypersaline. |
| | D) | Nothing eats bacteria. |
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5 | |
At low tide, which of these intertidal animals would be the most difficult to observe? |
| | A) | a chiton that lives on rocks |
| | B) | a mussel living in surf-swept areas |
| | C) | a crab that retreats into a burrow |
| | D) | a limpet that lives under algae |
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6 | |
In a rocky intertidal area, an observer probably could find the most filter-feeding barnacles in which area? |
| | A) | quiet silty pool |
| | B) | ocean-facing mid-tidal rock |
| | C) | upper part of a surf-swept cliff |
| | D) | under seaweeds |
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7 | |
Which feature is not found in organisms exposed to wave shock? |
| | A) | strong anchorage system |
| | B) | low body profile |
| | C) | suction cup |
| | D) | tolerance of low oxygen levels |
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8 | |
Feeding by sea stars benefits |
| | A) | mussels, by reducing the number of algal competitors. |
| | B) | lobsters, by reducing the numbers of mussels. |
| | C) | barnacles, by reducing the numbers of dog whelks. |
| | D) | periwinkles, by reducing the numbers of unicorn snails. |
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9 | |
In the lowest intertidal zone, seaweeds can eliminate other competing seaweeds by |
| | A) | having more larval stages. |
| | B) | shading them so that the competing species cannot carry on photosynthesis. |
| | C) | attaching to them. |
| | D) | being able to tolerate harsher environmental conditions. |
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10 | |
Polychaete worms with long, sticky tentacles feed by |
| | A) | catching particles from the water column. |
| | B) | producing a mucus net. |
| | C) | spreading the tentacles on the bottom and catching particles there. |
| | D) | pumping water through siphons. |
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11 | |
A burrowing worm is colored bright red. What might be the reason for this? |
| | A) | warning coloration |
| | B) | it's nocturnal |
| | C) | it contains hemoglobin |
| | D) | mate attraction |
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12 | |
Animals of the upper sandy beach generally feed |
| | A) | on dune plants. |
| | B) | on diatoms. |
| | C) | by scavenging. |
| | D) | by filtering the water at high tide. |
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13 | |
You could find a deposit-feeding sea cucumber in which rocky intertidal area? |
| | A) | in a hole in a rock by a tide pool |
| | B) | under a rock inside a quiet bay |
| | C) | where there is a lot of moving sand |
| | D) | where there is a lot of plankton |
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14 | |
An important discovery of the PISCO study is that |
| | A) | intertidal organisms do not show patterns of zonation. |
| | B) | distributions of individual species are more uniform than previously thought. |
| | C) | coastal upwelling influences predation and grazing. |
| | D) | coastal communities are more or less the same over very large areas of coast. |
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15 | |
At low tide on a soft-bottom area, an important predator could be a |
| | A) | shore crab. |
| | B) | sand dollar. |
| | C) | bird. |
| | D) | lugworm. |
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