Which of the following is the best definition of a galaxy?

a. cloud of dust and gas

b. ball of luminous plasma

c. system of stars, gas, and other planetary objects

How does land development destroy ecosystems? it increases human carrying capacity too rapidly. it converts them into residential or agricultural areas. it forces humans to import non-native plants and animals. it expands the natural range of native wildlife species.

Donde se encuentra el adn nuclear en un organismo eucariota?

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above