They're multiple ways to categorize nearly everything in biology. The value of an individual categorization scheme depends on the perspective of the user. The Classification of organisms is a hard task causes many organisms to have their differences and similarities, whereby making it very complicated in classifying organisms.
Stiffness in the neck can make it difficult for drivers to look behind when they are backing up.
<span>genetic variation in asexual species may have large effects on community and ecosystem functions, increasing their stability, productivity, and species richness.</span>
The process is called homeostasis.
Almost the entire system of an embryo is made of cartilage, whereas that of an adult is mostly made of bones.