Front

What are cnidarians?

Back

Cnidarians are invertebrates that have radial symmetry, stinging cells, tentacles, and a hollow body cavity. Examples include jellyfish and corals.

Front

What is the defining characteristic of arthropods?

Back

Arthropods are invertebrates with jointed appendages, segmented bodies, and an exoskeleton. Examples include insects, spiders, and crustaceans.

Front

What are mollusks?

Back

Mollusks are a diverse group of invertebrates that include animals like squids, snails, oysters, clams, and mussels. They typically have soft bodies and may have shells.

Front

What are the main characteristics of reptiles?

Back

Reptiles are cold-blooded animals that breathe with lungs, have dry skin covered in scales, and most lay eggs. Examples include snakes, lizards, and turtles.

Front

What is radial symmetry?

Back

Radial symmetry is a body plan in which body parts are arranged around a central axis, allowing for multiple lines of symmetry. Common in cnidarians.

Front

What is an exoskeleton?

Back

An exoskeleton is a hard outer structure that provides support and protection to certain animals, such as arthropods. It is made of chitin.

Front

What are the main groups of the animal kingdom?

Back

The main groups include invertebrates (like cnidarians, arthropods, and mollusks) and vertebrates (like fish, amphibians, reptiles, birds, and mammals).

Front

What is the difference between vertebrates and invertebrates?

Back

Vertebrates have a backbone or spinal column, while invertebrates do not. Examples of vertebrates include mammals and birds.

Front

What are the characteristics of amphibians?

Back

Amphibians are cold-blooded animals that typically have a life cycle that includes both aquatic and terrestrial stages. They usually have moist skin and lay eggs in water.

Front

What is the significance of stinging cells in cnidarians?

Back

Stinging cells, or nematocysts, are used by cnidarians for capturing prey and defense. They can inject toxins into other organisms.