Answer:Primary succession.
B, ligand-gated ion coupled receptor signaling
A closed circulatory system is present in organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body's cells.
<h3>What is the circulatory system?</h3>
The circulatory system is an organs system that works to carry out blood cells to all cells in the body.
The circulatory system is fundamental for transporting oxygen and nutrients to all cells of the body.
A closed circulatory system is a special organ system where the blood cells are not circulating in body cavities.
Learn more about closed circulatory systems here:
brainly.com/question/989029
Interstate 95 seem to follow the fall line because it was designed to go around rapids and waterfalls
Explanation:
The extreme side of the coastal plain of Virginia that has a chain of rapids and falls as its mark and which has rivers flowing around it is remarkably known as – Fall line. This observation was performed by John Smith first. This line has remarkable impact on Virginian geology.
The line of falls around it prevented the way of ships and led to the formations of some cities of Virginia. The connecting line of major cities of east coast, the Interstate 95 runs parallel to the fall line. This actually seems that it follows the fall line.
<span>b. eukaryotic</span>
Cells when grouped form tissues, when group of tissues are formed together they make organs, some organisms skip from organs to organs systems to form an existing organism as a whole. Describing how is the cells group is the process of multiplication of cell or the so-called cell division, mitosis.This mechanism of each cell produces another cell that binds together and produces again, repeatedly, to be a larger system called now the tissue as explained earlier. How? Through cell division called, mitosis. Excerptmeiosis –cell division specifically in the sex cells.<span>
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