<h2>Phylum Annelida</h2>
Explanation:
The given animal must be an Annelid.
Annelids are commonly called segmented worms. The characteristics features of annelid are:
- Segmented bodies , each segment is called annuli.
- Closed circulatory system.
- Stiff appendages and flexible skin.
- Eucoelomate i.e the presence of true coelom.
- Nephridia as excretory organs.
Since the animal discovered by the marine biologist has a segmented body and true coelom, it is obviously categorized in Phylum Annelida.
The process called Sheeting occurs when large masses of igneous rock, pArticularly granite, begin to break loose like the layers of an onion.
The correct answer would be option C. A skull from the genus Homo that dates from approximately 750,000 years ago has its foramen magnum at the bottom of the skull. The foramen magnum is the opening at the base of the skull where the spinal cord joins the brain. The foramen magnum of a Homo is in a more forward position indicating that it had a more erect posture.
It is maybe because the alpha helixsecundary structure) characterized by intramolecular hydrogen bonds between amino acid residues and on the other hand, the beta sheet is composed of extended chains with hydrogen bonds between adjacent chains (between residues from two distinct strands).
Many proteins contain both alpha helices and beta sheets, but some contain just one type of secondary structure.
