#554 What is a sponge?
What is a sponge? Sponges are animals that have a very porous skeleton and live in the sea. When we talk about sponges, we are talking about the organisms and…
What is a sponge? Sponges are animals that have a very porous skeleton and live in the sea. When we talk about sponges, we are talking about the organisms and…
Why do insects have an exoskeleton? To stop them drying out, for protection, for support, and to help them sense their surroundings. An exoskeleton is a hard skeleton that covers…