Answer:
they have certain functions and or adaptations that allow them to move without spines
Explanation:
The hormone testosterone promotes sexual desires in both males and females
Genetic variation is the answer to ur question
Volume - the amount of something in a three-dimensional area.
Meniscus - the curve that a liquid makes at the surface from surface tension.
I measured the volume of water in the container.
The water formed a meniscus near the top of the container.