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19 Cards in this Set
- Front
- Back
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Bacteria
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Prokaryotic, single-celled, microscopic organisms.
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Decomposers
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Organisms that break down dead organic matter into smaller molecules.
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Phytoplankton
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Photosynthetic organisms that drift in the water.
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Zooplankton
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Tiny floating organisms that are either small animals or protozoa.
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Thallus
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The complete body of an alga, not idderentiated into true leaves, stems, or roots.
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Haploid cell
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A cell that contains half the normal number of chromosomes (one from each pair).
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Diploid Cell
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A cell that has chromosomes which come in pairs.
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Symbiosis
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A close relationship between two species where ar least one benefits.
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What are two processes that autotrophic bacteria can use to convert energy into organic matter?
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Photosynthesis and chemosynthesis
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Why aren't cyanobacteria considered algae?
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These plant-like organisms are prokaryotic and therefore more like bacteria
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List two ways diatoms benefit humans.
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Diatoms produce large amounts of the world's oxygen and their fossilized shells can be mined for many commercial products. Toothpaste and filters
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When hiking, you find a large amount of abrasive, whitish powder on the side of a mountain. Your guide says it is made up of tiny fossilized bits of silica. How do you know that this area was probably once under the ocean?
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It is most likely a deposit of fossilized diatomaceous ooze (diatomaceous earth). These deposits are formed as ocean sediments.
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Why won't some restaurants serve fish harvested in areas of planktonic blooms?
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Some blooms are due to planktonic organisms that produce toxic substances that can poison fish that people eat.
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What is the function of the pneumatocysts on a thallus? |
Pneumatocysts help the blades of the thallus float on water. |
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Which type of algae (green, brown, or red) provides merchants with the emulsifying agent called algin? What does algin do?
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Brown algae contain algin, which helps substances stay mixed together.
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A seaweed that follows the alternation of generations lifecycle produces haploid (1n) spores. Into what type of generation will those haploid spores develop: sporophyte or gametophyte? |
In alternation of generations, the generations alternate between sporophyte and gametophyte. The sporophyte generation releases spores. Thus, spores always develop into the gametophyte generation. That generation will be haploid. |
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What two types of organisms are associated with one another in a lichen? |
A lichen is made up of a fungus and an alga. |
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Why don't the seagrasses need large, showy flowers?
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Seagrasses do not need to attract pollinators to spread their pollen. They release it in the ocean currents.
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What part of the red mangrove can help to accumulate sediment buildup?
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The red mangrove's prop roots help accumulate sediments.
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