Gut bacteria manufacture about 95 percent of the body's supply of serotonin, which influences both mood and GI activity. The pH of the digestive tract is 6.8. What substance(s) would you use to make a buffer with a pH close to that of the digestive tract

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates

Aremote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 15 – 20 km/hr some medium-sized rivers with slow-moving currents few coal deposits some oil exploration being conducted within 400 miles based on the above information, which energy source would be the most economical and safest for the community to pursue? a. fossil fuel b. hydroelectric c. nuclear d. wind