Answer:
Invertebrates are the organisms in which backbone or vertebral column is absent.
The three macroinvertebrate categories are annelids, mollusks and arthropods.
Annelids are the organisms having segmented body. They are found in moist places. Examples are leeches and earth worms.
Mollusks are the organisms which are enclosed in a calcium carbonate shell. Examples are snails and slugs.
arthropods are the invertebrates which have segmented body and jointed appendages. Examples are insects and crustaceans etc.
4, any other option is a mix between dna and rna, or describes rna
Answer:
Murine fibroblasts
Explanation:
Fibroblasts are the most common cellular type in the connective tissue of mammals and immortal murine fibroblasts are often used in molecular biology to study different characteristics such as, for example, to understand the tissue repair processes
