2 tarsier Save Question 34 (ó points) a Define the words in BOLD in the article

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2 tarsier Save Question 34 (ó points) a Define the words in BOLD in the article below. Scientists from the University of Bristol have uncovered a 480-million-year-old fossil in Morocco which sheds new light on the evolution of molluscs. Calvapilosa kroegeri resembles a slug covered with short spines all over its upper body and with a large 'fingernail-like shel over its head. In the center of the head of this species are two rows of teeth which was demonstrated as a radula. Following a phylogenetic analysis molluscs, Calvapilosa kroegeri was revealed to be the most primitive member of the lineage leading to chitons. F8 F4 F5 F6 F2 F3 F1

Explanation / Answer

ans. Molluscs are invertebrate organisms, which belong to phylum Mollusca. They found terrestrial, freshwater, and marine habitats. characteristics of molluscs are the nervous system, the presence of radula, and a presence of mantle. Molluscs have open circulatory system and a hemocoel cavity, by which coelomic fluid and blood circulate to the internal organs. Common examples of molluscs include snail, octopus, chepalopods, unio, chiton, helix, and mytilus.

Radula is an unique organ of eeding system of molluscs. It performs the function of tongue. The radula scapes the algae and bacteria of rocks and remains associated with a cartilaginous supporting organ, odontophore.

Phylogenetic analysis is defined as classification of indiviuals of a commmon ancestor on the basis o descent. It includes the study of evolutionalry background of the organisms of a group, which are genetically related.

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