Help! Which of the following describes energy and matter in ecosystems? Explain why you chose your answer. Answer choices are in the picture below.

Consider this plant cell which organelle is labeled g

The wind speed in the region between cities a and b was probably the greatest at noon on which day?

American scientist, linus pauling, was one of many scientists racing to discover the molecular structure of dna. pauling initially thought that the molecule was a triple helix. later, james watson and francis crick unveiled their double helix model, which turned out to be an accurate description of the molecule's shape. why did watson and crick succeed when pauling failed?