This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
ScanSolve AI Answer
Here are the answers for Activity 1: 1. An arrangement of body structures in relation to some axis of the body: Symmetry 2. An evolutionary trend in the animal kingdom toward centralisation of neural and sensory organs in the anterior region of the body: Cephalization 3. Triploblastic animals that lack a through-gut and coelom: Acoelomates 4. Animals with two cell layers: Diploblastic 5. A collective name for animals without a backbone: Invertebrates Here are the answers for Activity 2: 2.1 Phylum containing organisms that are triploblastic: BOTH A AND B (Platyhelminthes and Annelida are both triploblastic) 2.2 Animals without back bones: A ONLY (Invertebrates are animals without backbones) 2.3 A fluid-filled body cavity lined by mesoderm: B ONLY (A coelom is a fluid-filled body cavity lined by mesoderm) That's 2 down. 3 left today — send the next one.