Which of the Following Animals Possess a Hydrostatic Skeleton

Q12: Which of the following is NOT part

Q13: Arrector pili muscles in human skin<br>A)initiate shivering.<br>B)close

Q14: _ is/are constantly shed; _ is/are not

Q15: Skeletal muscles are attached to the skeleton

Q16: The tetrapod skeleton is modified for support<br>A)on

Q18: The _ is the external covering of

Q19: The functional unit of a myofibril is

Q20: The outer covering of an animal,the _,functions

Q21: The capacity to receive and respond to

Q22: The thick filaments of vertebrate skeletal muscle