The correct answer for the question that is being presented above is this one: "Synthesized." A scientist isolates a gene from a human cell that codes for a specific protein. The gene is inserted into a bacterial plasmid in order to mass produce the protein for medical purposes. The next step in mass production of the protein would be synthesized of the bacterium containing the modified plasmid.<span>
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Answer: All the above options are correct about the characteristics of Lumbriculus variegatus.
Explanation:
Lumbriculus variegatus also called the black worm belongs to the phylum Annelida and is used by biologists to illustrate:
-blood vessel pulsations,
-swimming reflex,
-peristaltic crawling behavior,
-giant nerve fiber action potentials.
These studies where carried out on them due to the characteristics they possess. These includes:
-its blood circulates in a closed circulatory system
-Freshwater worm found throughout North America and Europe
-Prefers the shallow habitats found at the edges of ponds, lakes, or marshes
-Feeds on decaying vegetation and microorganisms.
Store energy, provide metabolic fuel and help in digestion
Character displacement refers to the phenomenon where differences among similar species whose distributions overlap geographically are accentuated in regions where the species co-occur, but are minimized or lost where the species' distributions do not overlap.
