The video explores the evolution of brains across species, focusing on the research of neurobiologist Molina Hale. Hale studies fish brains, particularly zebrafish, to understand how neural circuits generate movement. The video highlights the simplicity of the zebrafish's brain, allowing scientists to observe neuron activity. It also examines the startle circuit in fish, providing insights into neural circuit evolution. By studying these simple systems, scientists aim to uncover the mysteries of the human brain.

Which of the following animals is mentioned as having a brain in the video?

• Jellyfish

• Crabs

• Sponges

• Corals

What is one of the main functions of the brain that Molina Hale focuses on in her research?

• Generating thoughts

• Generating memories

• Generating emotions

• Generating movement

What is the role of neurons in the nervous system as discussed in the video?

• They store energy

• They carry messages

• They produce hormones

• They filter toxins

Why are zebrafish larvae particularly useful for studying neural circuits?

• They are very fast

• They are very colorful

• They are transparent

• They are very large

What is the significance of the startle circuit in the research discussed?

• It is very slow

• It is very simple

• It is very complex

• It is very rare