Chordata is a phylum of animals that includes vertebrates and some closely related invertebrates. This phylum is characterized by the presence of a notochord, a hollow nerve cord, pharyngeal slits, and a post-anal tail at some stage of their development.
Key Characteristics of Chordata
Notochord: A flexible, rod-like structure that provides support.
Nerve cord: A hollow tube dorsal to the notochord that develops into the spinal cord and brain in vertebrates.
Explain how Earth's fluid outer core creates the magnetosphere and how this helps protect both humans and technology (such as satellites) from solar winds.