Question

Kingdom Animalia is characterized by
A. Direct independence on autotrophs
B. Indirect dependence on autotrophs
C. Absence of chlorophyll
D. Absence of cell wall

Answer 1

Hint: The kingdom Animalia includes all animals. Animals are multicellular, eukaryotic organisms. They are heterotrophic. Animals consume organic material, breathe oxygen, able to move and reproduce sexually.

Complete Answer:
- Animals belong to the biological kingdom Animalia. Over 1.5 million living animal species have been described.
- Animals have several characteristics that apart them from other living beings. The animals are heterotrophic. All animals are motile but some animals like sponges, corals later become sessile. Blastula is stage in the embryonic development that is unique to most animals, it allows the cells to be differentiated into specialised tissues and organs. The animals are eukaryotic and multicellular organisms.
- All plants have cell walls while animals do not. The plants produce their own food while animals are heterotrophic.
- Cell wall is a structural layer which surrounds the cells. Cell walls can be tough, flexible and can be rigid. Cell wall provides both structural support and protection. Unlike the eukaryotic cells of plants and fungi, animal cells do not have cell walls. Animal cells are eukaryotic cells enclosed by plasma membranes.

So, the correct answer is D.

Note: Green plants make their own food through a process called photosynthesis. They use green pigment called chlorophyll. Plants are autotrophs and they produce their own food. Cell walls are found in plant cells and help in maintaining the shape. The ability to move about by the use of specialised muscle tissues is a hallmark of the animal world.