. Which phrase best defines a galaxy?

Galaxies are basically billions and billions of stars, gas, and dust packed together which forms a galaxy. The phrase that best defines a galaxy is "large collection of stars, gas, and dust held together by gravity"

Explanation:

Which phrase best defines a galaxy?

tightly packed group of older stars

large grouping of more than two stars

loose, disorganized star cluster held together by gravity

large collection of stars, gas, and dust held together by gravity

Explanation:

I´ve done that quiz at school already

the correct answer is b. possesses the characteristic of compartmentalization of organelles, wherein the organelles are bound by membranes.

explanation:

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive