Class boundaries are taken on the X-axis. Why not class limits?

Largest algae belong to the class

What is wool classing?

The largest class in Animalia is

Agaricus belongs to the class

Vertebrates are group into these many classes

Long jump made by 30 students of a class are tabulated as How many students are in second class interval?

Morels and truffles belong to this class of fungi

Common round worm belongs to the class

Calculate the boundaries of the class interval in the above table 10-20,20-30.