Trevor examines some water from the open ocean and finds that it contains several single-celled and multi-celled organisms. what term should trevor use to describe the organisms based on their method of locomotion?

Classification of the organisms based on their method of locomotion would be flagella, pili or gliding. The structure that offers the highest motility of those 3 would be flagella.
An organism with flagella could be further classified on the number of flagella such as: atrichous(no flagella), monotrichous(1 flagella), amphitrichous(flagella on both side), lophotrichous(many flagella on one end), peritrichous(flagella all around the membrane)

The answer would be cstep by step explanation: all of the other animals developed their features while the salamander was born with them

Spherical shaped cell might increase the surface area and decrease the volume.