Animal Phyla And Their Characteristics! Trivia Facts Quiz

Explanation
The characteristics of phylum Arthropoda include having jointed appendages and an exoskeleton. Arthropods, such as insects, spiders, and crustaceans, have limbs that are divided into segments and can bend at joints. Their exoskeleton is a hard outer covering that provides support and protection. However, they do not have a backbone or a bell shape.

Explanation
Chordates can be described as animals that contain a backbone because chordates are a phylum of animals that possess a notochord, which is a flexible rod-like structure that provides support and stability. The notochord eventually develops into a backbone or vertebral column in most chordates. This distinguishing feature sets chordates apart from other animal groups and is a defining characteristic of this phylum.

Explanation
The correct answer is Arthropoda. Arthropoda is a phylum that includes animals with jointed appendages, segmented bodies, and an exoskeleton. This animal is likely to belong to the phylum Arthropoda because it exhibits these characteristics. Echinoderm, Platyhelminthe, and Mollusca are different phyla that do not match the description of the animal in question.

Explanation
The correct answer is Cnidaria. Cnidaria is a phylum that includes animals such as jellyfish, coral, and sea anemones. These animals have radial symmetry and stinging cells called cnidocytes. They typically have a sac-like body plan and a single opening that serves as both the mouth and anus. Echinoderma is the phylum that includes animals like starfish and sea urchins, which have a spiny skin and a unique water vascular system. Mollusca is the phylum that includes animals like snails, clams, and octopuses, which have a soft body and often a hard shell. Annelida is the phylum that includes segmented worms like earthworms and leeches.

Explanation
All mollusks share the characteristic of being soft-bodied invertebrates. This means that they lack a backbone and have a soft body covered by a protective shell. This is a defining feature of the entire mollusk phylum, which includes animals such as snails, clams, and octopuses. While some mollusks do live in salt water, it is not true that they only live in salt water. Additionally, mollusks do not have vertebrates and do not breathe with lungs.

Explanation
An animal that does not have a backbone is called an invertebrate. Invertebrates make up the majority of animal species and include insects, worms, mollusks, and jellyfish, among others. Unlike vertebrates, which have a backbone or spinal column, invertebrates have a wide range of body structures and support systems. This distinction is important in classifying and understanding the diversity of animal life on Earth.