Asoil characteristic of the humid eastern u. s. is

Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

Any sound above what db can cause hearing loss in human beings