They have energy.
If something is moving, it must have kinetic energy.
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Answer: They are typically smaller than spiral galaxies.
Some show evidence for prior collision or close encounter with another galaxy.
They exhibit vigorous star-forming activity.
Irregular galaxies are typically smaller than spiral or normal ellipticals, of irregular form, and without spiral arms. Irr I galaxies are often characterized by lots of gas, dust, and associated star formation. Irr II galaxies have forms that indicate prior collisions or close encounters with other galaxies. Irregular galaxies are one of the most common types of galaxies.
The characteristic is uniformity.
<h3>Uniformity of money</h3>
Money is said to be uniform because irrespective of the nature it exists, the same amount must have the same purchasing power.
For example, a dollar in paper form and a dollar in coin form must be able to buy the same 1 dollar worth of goods.
Thus, a dollar bill, irrespective of its age, has the same purchasing power as a new, crisp dollar bill.
More on uniformity of money can be found here: brainly.com/question/17039370
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