The Human Body<span> Has Over 600 </span>Skeletal Muscles<span> That Move Bones and Other Structures. </span>Skeletal muscles<span> attach to and move bones by contracting and relaxing </span>in<span> response to voluntary messages from the nervous system. </span>Skeletal muscle<span> tissue is composed of long cells called </span>muscle<span> fibers that have a </span>striated<span> appearance.
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~Dukuccino</span>
<span>... many people have little regard for their effect on the environment and will do whatever they can to make money. If there are fewer fish available in coastal waters, they'll go wherever they can find fish.</span>
Answer:
B. Their cells have a nucleus.
Explanation:
Protists are eukaryotes, which means their cells have a nucleus and other membrane-bound organelles. Most, but not all, protists are single-celled.
These characteristics are only present during embryonic development in some chordates. The notochord provides skeletal support, gives the phylum its name, and develops into the vertebral column in vertebrates. The dorsal hollow nerve cord develops into the central nervous system: the brain and spine.
Science relies primarily on empiricism, the premise that knowledge should initially be acquired through observation.
