Describe 2 distinct characteristics of the phylum Annelida.

King penguin chicks recognize their parents by

Kin selection can contribute to an organism’s inclusive fitness.

Female rhinos mate often and have at least 1 calf per year, so male rhinos never have difficulty getting females to mate.

Identify the correct Class for this organism.     

Describe 2 distinct characteristics of the phylum Nematoda.

In the experiment below, both test tubes were filled with yellow phenol red. Test tube A (left) contained a plant, and test tube B (right) did not.                  A         B      After 24 hours, the tubes looked like this:                 A          B        [a]  Which test tube represents the control in this experiment? [b]  What process occurred that made test tube A change color? [c]  Was carbon dioxide used, produced, or not changed in tube A? [d]  Were these tests tubes placed in the light or dark? [e]  Was carbon dioxide used, produced, or not changed in tube B?

Use the Abbreviated Key to the Animal Kingdom below to key out this organism.  Select all steps that apply.  

Phenol red turns yellow when carbon dioxide is added because

Describe 2 distinct characteristics of Chondrichthyes.