Approximately 9l of fluid enters the gastrointestinal tract daily, 2l by ingestion and 7l by secretion. almost percent of this volume is reabsorbed so that fecal fluid loss is only 100-200 ml/d.

(drag each tile to the correct identify which questions can be answered by what can be answered by science or which cannot. -is it right or wrong to use genetic engineering to produce new food products? -what are the most common social settings that tend to produce accomplished artists? -if a new gene is added to the genome of a tomato species, will that species be more resistant to insects? -should humans use biotechnology to bring extinct organisms from the fossil record back to life? -do the types of organisms found in the fossil record appear in consistent sequences in different parts of the world? -are michelangelo's paintings more impressive than rembrandt's?

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

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?