Alfred Wegener, is who proposed the idea of Pangaia
D - Eubacteria and Archaebacteria
Answer:
Slow Scale of Change for the first one and Erosion for the second one.
Answer:
The radially symmetrical deuterostome invertebrate most closely related to chordates is the echinoderm.
Explanation:
Options for this question are:
- <em>Annelid.</em>
- <em>Echinoderm.</em>
- <em>Arthropod.</em>
- <em>Mollusk.</em>
Echinoderms, like the starfish, are a phylum of organisms derived from deusterotomates, in whose embryonic development the anus is formed first, and characterized by their pentaradial symmetry and the existence of an internal skeleton. Deuterostomy establishes a link between the echinoderms and the chordates, and the possibility that they are both descended from a common ancestor.
The relationship between invertebrates, such as echinoderms, and vertebrate organisms has been studied, establishing that hemicordates are the link that links both types of organisms.