BIO- Taxonomy and Phylum under invetebrates

What is the definition of taxonomy?

• The scientific study of the kinds and diversity of organisms

• The ordering of animals into groups based on relationships

• The activity of classifying organisms

• The highest level of biological classification

What is the meaning of systematics?

• The scientific study of the kinds and diversity of organisms

• The theory and practice of classifying organisms

• The highest level of biological classification

• The activity of classifying organisms

What is a taxon?

• The scientific study of the kinds and diversity of organisms

• A taxonomic group of any rank that is distinct enough to be assigned to a category

• A high-ranking classification used to categorize living organisms

• The ordering of animals into groups based on relationships

What is the domain in biological classification?

• The ordering of animals into groups based on relationships

• A taxonomic group of any rank that is distinct enough to be assigned to a category

• A high-ranking classification used to categorize living organisms

• The highest level of biological classification

What is the defining characteristic of Phylum Porifera?

• Slender, cylindrical body with tapered ends

• Radial symmetry and presence of Cnidocytes

• Unsegmented and dorsoventrally flattened

• Simplest animal; sessile with lack of true tissues and organs

What is the primary tissue layers in Phylum Cnidaria?

• Epidermis and Gastrodermis

• Ectoderm, Mesoderm, Endoderm

• Radial symmetry and presence of Cnidocytes

• Choanocytes & archaeocytes

What is the body cavity type in Phylum Nematoda?

• Pseudocoelomate

• Hemocoel

• Coelomate

• Acoelomate

What is the defining feature of Phylum Annelida?

• Soft-bodied animals often protected by a hard shell

• Slender, cylindrical body with tapered ends

• Marine animals with a spiny skin and radial symmetry

• Segmented body with repeated units

What is the characteristic of Phylum Mollusca?

• Slender, cylindrical body with tapered ends

• Soft-bodied animals often protected by a hard shell

• Segmented body with repeated units

• Jointed appendages and an exoskeleton made of chitin

What is the body cavity type in Phylum Arthropoda?

• Acoelomate

• Coelomate

• Pseudocoelomate

• Hemocoel