Question

Absence of differentiated tissues is the feature shown by

• A. Arthropoda
• B. Bryozoa
• C. Chordata
• D. Cnidaria
• E. Mollusca

Answer 1

Answer: (B)

Bryozoa

Differentiation of cells is the process where the cell changes from one type to another and make more specialized. During the development of multi-cellular organisms, cell differentiation changes zygote to a complex system of tissues. In the case of unicellular animals, there is no trace of tissue differentiation as their body is made up of only one cell. The Bryozoa, commonly known as moss animals which live in the colony and thus, the mechanism of functional differentiation of tissues are unknown.

So, the correct answer is option B.