Nitric oxide was discovered as a secondary messenger in the 1980s and has grown in popularity since that time. In fact, it was named molecule of the year in 1992 by Science Magazine, one of the leading global scientific publications, and the Nobel Prize in Physiology and Medicine for 1998 was awarded to the scientists who discovered its properties as a signaling molecule. Add to that the link to Viagra, one of the most profitable sexual enhancement drugs on the market, and you have a molecular superstar.

Eristics do scientists use to distinguish between organisms in different kingdoms

Maria wanted to grow a fern in her backyard. acting on a suggestion from a friend, she collected brown dots from the underside of a fern's leaves and then potted them. after a few days, maria saw small fern leaves erupting from the pot. which statement explains this phenomenon? a. the fern transitioned from gametophyte generation to sporophyte generation. b. the fern grew as a result of mitosis. c. the fern transitioned from sporophyte generation to gametophyte generation. d. the fern grew to be genetically identical to its parent plant.

Microorganisms aren’t all decomposers; in fact, many act as producers or primary consumers in an ecosystem. how do microorganisms that act as producers benefit the rest of an ecosystem in terms of energy transfer? what about microorganisms that act as primary consumers?