Please Define the Following Key Terms

question 82

Short Answer

Please define the following key terms.
-relics

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Definitions:

Nematodes

A phylum of worms also known as roundworms, characterized by elongated, cylindrical bodies, and often found in soil and aquatic habitats.

Insects

A group of arthropods distinguished by having a body divided into three sections (head, thorax, abdomen), three sets of legs, complex eyes, and a single pair of antennae.

Invertebrates

Animals without a backbone, comprising a diverse group including insects, mollusks, and arachnids.

Vertebrates

Animals that have a backbone or spinal column, including fishes, amphibians, reptiles, birds, and mammals.