Assignment: Distinguishing Phyla Exploration In this exploration, you will look carefully at pictures of animals and consider some physical
characteristics that scientists use to classify each organism. For each characteristic, it may be
difficult to reach an accurate conclusion using only a picture. Actual classification relies on far
more characteristics than are considered in this exploration, but by comparing your results, you
can begin to get an idea of how each kind of organism is similar to and different from the others.
Examine the pictures of the organisms in the lesson. Then fill in the Observations Table using the
pictures as references. In each case, use your best judgment based on what you can see in the
picture.

Except hold on to his or her beliefs even if there is no evidence for those beliefs.

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.

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