Two birds that look very similar to each other have always been considered two distinct species based on differences in their body size and in where they live. a group of ornithologists studying the two species begins to think they might not be separate species based on observed behavior. what would be the best next step regarding this new hypothesis?

Which class of organic compounds makes up the channels and pumps that move materials from one side of the cell membrane to the other? a.) carbohydrates b.) lipids c.) proteins d.) nucleic acids

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.