How long does it take light to travel the 100,000 ly distance across the diameter of the disk of our galaxy? -Only a few seconds
-Billions of years
-33,000 years
-100,000 years

Look at the picture below . what does this picture represent ?

Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm? a) it produces seeds. b) it retains its fertilized egg within its archaegonium. c) it lacks gametangia. d) it undergoes alternation of generations.

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.