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.

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing