Which body system produces movement by contracting and relaxing? Integumentary system
Muscular system
Skeletal system
Synovial joint system

Previous pagenext pagepage 3 ofquestion 3 (1 point)which of the following consist of cells that do not have a nucleus? of the above

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different