The collar cells of sponges are similar to a. ciliated paramecia b. flagellated protists c. sessile sporozoans d. amoebas

Speed is the ratio of the distance of an object moves to

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.

In what part of the body does the most muscle activity happen?