B. community
hope this helps;)
An experiment or survey must be controlled in order to receive accurate results.
In an experimental group, the independent variable is changed. But in the control group, the independent variable stays the same.
The small intestine is the longest part of alimentary canal with a length of 4.5 to 7 m and narrow in width, while the large intestine is the hinder-most part of the alimentary canal with a length of 1.5 m. it called the large intestine because it has a width of 4-6 cm. Also in the large intestine circular folds are absent while its present in the small intestine.
Synovial joint most common occuring type of joint, which also produces greatest kind of movement
