NEET BIOLOGY

Detailed explanation-1: -However, a sponge (an, is, finds) the simplest form of a multicellular (for, animal, pores). Most sponges live in the oceans (tiny, of, or) the world. A few sponges live (not, move, in) fresh water.

Detailed explanation-2: -Sponges. Usually found in the sea, sponges are some of the world’s simplest animals. They have no heads, eyes, tails, or mouths, and they live most of their lives rooted in one spot. Their bodies are full of tiny holes called pores.

Detailed explanation-3: -Sea sponges are one of the world’s simplest multi-cellular living organisms. Yes, sea sponges are considered animals not plants. But they grow, reproduce and survive much as plants do. They have no central nervous system, digestive system or circulatory system – and no organs!

Detailed explanation-4: -In addition to the osculum, sponges have multiple pores called ostia on their bodies that allow water to enter the sponge. In some sponges, ostia are formed by porocytes: single, tube-shaped cells that act as valves to regulate the flow of water into the spongocoel.