In the 1920s, edwin hubble looked at the spectra of stars from distant galaxies. to his surprise, he found that all of these spectra were red-shifted, and that the more distant the galaxy, the greater the red-shift. what is a reasonable conclusion from this evidence? a. the star is relatively hot. b. the star is relatively cool. c. the star is moving rapidly toward us. d. the star is moving rapidly away from us.

Embryos of different species look very similar, which shows that the organisms share a ancestor.

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.