The answer to your question is bacteria
<span>Intrinsic factor is a glycoprotein principally secreted by the parietal cells of the stomach. This secretion is needed to produce mature erythrocytes. Its secretion is governed by the same biochemical processes that regulate acid secretion and its action is to assist in the absorption of vitamin B12.</span>
THE VESSEL IS THE MIDDLE HEPATIC VEIN.
The hepatic veins are the one that carry oxygen depleted blood from the liver into the inferior vena cava. They also transport blood that has been drained from the colon, pancreas, stomach and the small intestines. The hepatic veins are three in number, they are: right hepatic vein, middle hepatic vein and the left hepatic vein.
Answer:
recognizes a hormone’s chemical structure
Explanation:
In living systems, chemical messengers called hormones are secreted into the body via the bloodstream or ducts by certain glands called endocrine glands e.g pancreas, hypothalamus etc. These hormones are meant to effect a physiological change in certain cells called TARGET CELLS.
In biology, a target cell is any receiving cell that has the ability to respond to signals and messengers like hormones. This responding ability of hormones is due to the possession of specific receptor sites for the specific hormones. The receptor on a particular target cell recognizes that specific hormone's chemical structure, hence, will only respond to it.
For example, an insulin hormone secreted by the pancreas will only be responded to by a target cell that recognizes the chemical structure of the insulin protein using its receptor molecule.
The taxa under which the given plant fossil come is angiosperm.
<h3>What are taxa?</h3>
Taxa refer to any unit employed in the discipline of biological classification, often known as taxonomy. Taxa are organized in a hierarchical order, from kingdom to subspecies, with a particular taxon typically containing numerous taxa of lower rank.
Taxa are given formal names after being properly identified by nomenclature codes and systems. Bryophyta, Pteridophyta, Gymnosperms, and Angiosperms are a few examples of major plant taxa.
Therefore, the taxonomic group from which the presented plant fossil is derived is angiosperm.
To learn more about taxa, refer to the link:
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