In some animal groups, the body is found divided into compartments with at least some organs. This characteristic feature is called
1. Segmentation
2. Metamerism
3. Metagenesis
4. Metamorphosis
Given below are types of cells present in some animals. Which of the following cells can differentiate to perform different functions?
1. choanocytes
2. interstitial cells
3. gastrodermal cells
4. nematocytes
Animal | Division of Labour |
i. Pheretima ii. Fasciola iii. Spongilla iv. Obelia |
A. Organ level B. Cellular aggregate level C. Tissue level D. Organ system level |
Body cavity is the cavity present between body wall and gut wall. In some animals the body cavity is not lined by mesoderm. Such animals are called.
1. Acoelomate
2. Pseudocoelomate
3. Coelomate
4. Haemocoelomate