Explanation:
there are larger irregular shaped cells with separate cell walls
Answer:
Tunica
Explanation:
The cell layer which is common to all blood vessels regardless of their size is known as Tunica. These layers usually lines the layers of the connective tissues of the body such as the artery, vein and capillary.
The Tunica is divided into three parts known as Tunica intima, Tunica media and Tunica adventitia. They usually vary in size according to the blood vessels I’m which they are found in which depicts different and specialized function.
A short chain of the cyanobacterial cells found in the Bitter Springs Chert in northern Australia (about 1 billion years old). The bulk of modern genera really resemble cyanobacteria that are closely related to those that are living today. Unlike this fossilized cyanobacterium.
The fact that microorganisms can even leave fossils may surprise you. The oldest cyanobacteria-like fossils, which are among the oldest fossils ever found, are from the Precambrian, but one specific type of bacterium, the cyanobacteria or "blue-green algae," has left a fossil record that extends all the way back to that time. Larger than other bacteria, cyanobacteria have the ability to produce a thick cell wall. More crucially, cyanobacteria have the ability to form enormous, layered structures known as stromatolites or oncolites, depending on whether or not they resemble domes (if round).
Learn more about cyanobacteria, here
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I think I will go in option c is the best answer please mark as brianlist