Which statement correctly describes the muscular system of a flatworm? All of the muscles are involuntary muscles. All of the muscles are attached to a center bone. It is made up of three types of muscle tissue. It is made up of two layers of muscle.

Amines amides and amino acids are categories of

An organism's reproductive strategy includes all of the following except a. the number of offspring produced. b. the amount of energy expended in producing offspring. c. the length of time parental care is given d. the number of alleles an organism passes on.

This chart represents four government agencies and a contribution each has made to society. where is the error in this table?