Next > Pretest: Organization of Organisms Su Drag each tile to the correct location. Match the characteristics to the correct phylum. organisms lack symmetry adult forms are sessile organisms have specialized stinging cells two types of body plans exist-polyp and medusa organisms obtain food by filtering water phenomenon of alternation of generation is observed Cnidaria Porifera

Cnidaria

→ Organisms have specialized stinging cells

→ Two type of body plans exist - polyp and medusa

Porifera

→ Organisms lack symmetry

→ Adult forms are sessile

→ Organisms obtain food by filtering water

→ Phenomenon of alternation of generation is observed.

Explanation:

Cnidaria, also known as the coelenterata, is a phylum of mostly marine animals having about 9,000 living species. Some of them include the corals, hydras, jellyfish, sea anemones, sea whips, etc. They possess specialized cells known as cnidocytes ( also known as “stinging cells”).  These cells can seen around the mouth and tentacles cnidarian. They immobilize their prey with toxins. These Cnidaria have two body plans and which are polyp and medusa.

The phylum Porifera are known as the pore bearers. It has about 5000 species. Their adult forms are sessile. They live permanently attached to rocks. They can under alternation of generation. They possess no organs in their bodies. Also, they lack symmetry. They can be referred t as filter feeders because they obtain food by filtering water.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

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the bald eagle got 50 because everything gets 10% of what they consume and since 50 is ten % of 500 hundred that means the   grasshopper had to have consumed a plant with 5,000 calories of energy