In order to determine a manatee populations , 10 manatee's were captured, tagged, and released. Later, 15 manatee's were captured. Of the 15 snails, 2 were already marked. What is the estimated size of the manatee population?( just input the number )

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Name the glands associated with human digestive system

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees