What is first animal kingdom to have organ differentiation?
Answers
This topic gives an overview of;
Animalia
Porifera
Coelenterata
Platyhelminthes
Nematoda
Annelida
Arthropoda
Mollusca
Echinodermata
Protochordata
Vertebrata
The Animal Kingdom
Animalia
These are organisms which are eukaryotic, multicellular and heterotrophic. Their cells do not have cell-walls. Most animals are mobile. They are further classified based on the extent and type of the body design differentiation found.
Porifera
The word Porifera means organisms with holes. These are non-motile animals attachedb to some solid support. There are holes or pores all over the body. These lead to a canal system that helps in circulating water throughout the body to bring in food and oxygen. These animals are covered with a hard outside layer or skeleton. The body design involves very minimal differentiation and division into tissues. They are commonly called sponges, and are mainly found in marine habitats. Some examples are shown.
Answer:
Nematoda
Annelida
Arthropoda
Mollusca
Echinodermata
Protochordata
Vertebrata
The Animal Kingdom
Animalia
These are organisms which are eukaryotic, multicellular and heterotrophic. Their cells do not have cell-walls. Most animals are mobile. They are further classified based on the extent and type of the body design differentiation found.
Porifera
The word Porifera means organisms with holes. These are non-motile animals attachedb to some solid support. There are holes or pores all over the body. These lead to a canal system that helps in circulating water throughout the body to bring in food and oxygen. These animals are covered with a hard outside layer or skeleton. The body design involves very minimal differentiation and division into tissues. They are commonly called sponges, and are mainly found in marine habitats. Some examples are shown.