Answer:
they have certain functions and or adaptations that allow them to move without spines
Explanation:
Answer:
At the microscopic level of a visceral muscle cell are actin and myosin filaments. They slide past each other in an antiparallel manner to shorten the distances between their ends. In a smooth muscle cell, the ends of chains of these functional units are attached to the cell membrane. They are several in a cell arranged in an elaborate framework. They contract together and deferentially to enable the muscle to contract as needed.
I'll give some help
if u know Country's it will be easier and if u know how the Country looks like it will make sense. Basically just read the bottom paragraph and it will make sense.
<span>The offspring would have twice the number of chromosomes it's supposed to have.</span>