A group of marine invertebrates, including starfish, sea urchins, and sea cucumbers, characterized by radial symmetry and a calcareous exoskeleton.

The automatic repetition of words or phrases, often seen in conditions such as autism or after brain injury.

The ability of certain animals (like bats and dolphins) to detect objects by emitting sound waves and analyzing the returning echoes.

The involuntary imitation or repetition of another person’s movements, often seen in certain neurological conditions.

A serious complication of pregnancy characterized by high blood pressure and seizures, typically occurring after the 20th week of gestation.

A genetic disorder caused by the presence of an extra copy of chromosome 21, leading to intellectual disability and physical characteristics.

A male bee, typically responsible for mating with the queen, or in other contexts, a remote-controlled or unmanned vehicle.

A genus of small fruit flies often used in genetic research due to their short life cycle and ease of breeding in laboratory conditions.

A chemical substance used to treat, prevent, or diagnose diseases, or to alter physiological functions in the body.

An extinct group of primates, considered to be early ancestors of modern great apes and humans.