When is it necessary for a scientists to do research? select all that apply. before forming a hypothesis only after a hypothesis is written after generating an idea from an observation when designing an experiment to test a hypothesis

Which nucleotide component contains nitrogen

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .

Which process involves glucose reacting with oxygen to produce energy, carbon dioxide, and water? a. photosynthesis b. atp production c. glycolysis d. cellular respiration