I'd say stone tools. Stone can be chiseled or left alone and be used as a weapon to defend one's self, or as a way of getting food.
Answer:
Temperate deciduous forest
Explanation:
rain forest soil is highly acidic as its what trees there rely on for absorbing nutrients. The type pf clay present there also has poor ability to trap nutrients so they usually get washed away. Its almost the opposite for deciduous forests.
Answer:
Cellular respiration uses energy in glucose to make ATP. Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport. In glycolysis, glucose is split into two molecules of pyruvate. ... Life first evolved in the absence of oxygen, and glycolysis does not require oxygen.
Explanation:
Got it from Goog|e >.<
Answer:
"U"-shaped, with peaks at the low and high extremes of beak size; disruptive selection