Ahypothesis is a) much the same thing as a theory. b) a question based on observations c) series of connected observations d) a guess based on some knowledge. asap! 25 points!

Areal dna molecule consists of thousands of these pairs of nucleotides. what is the pairing arrangement of the nitrogen bases

Several billion years ago which gas was the least prevailant in the atmosphere

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid