The right answer to this question is option A. Epithelial
Explanation:
An Epithelial tissue has both the characteristics mentioned in the question, it's so tightly packed and regenerative. This kind of tissue is commonly known for the second function, the regeneration, but it contains lots of other functions that can help the organism to work properly, for example, secretion. There's a way to recognize different kinds of epithelial tissues to, and it's by their appearance, being highly related to its location on the body. The most common types of epithelial tissues are simple epithelium and stratified epithelium, both can be found in a single organism depending on the location and what the body needs.
Epithelial tissue. This type of tissue is made up of cells that are closely packed and arranged in one or more layers. Epithelial tissues cover internal and external body surfaces. They have a high regenerative capacity.and has many functions including, protection, absorption, secretion, sensation and excretion.
True or false: Typically, once a protein is synthesized in a healthy cell, it will perform its function indefinitely because the cell environment is highly controlled.
Based on the scenario being described within the question it can be said that the most likely reason for this misconception would be that the spiral galaxies looked like clouds of gas and dust through telescopes because of their distance from Earth. During that time telescopes were still not as advanced and could only see so much, nowadays they are much more advanced and these galaxies are being analyzed and understood more clearly.
