The Kreb's cycle happens after Glycolysis, and generates 4 ATP. Which of the following is a requirement for the Kreb's Cycle to occur? A. Carbon Dioxide
B. Oxygen
C. Glucose
D. NADH

Linda and julia are trying to determine whether their ideas are scientific or pseudoscientific. linda's idea is free of bias. julia's idea gives the same result when tested repeatedly. which statement is correct about linda and julia's idea?

Aprocedure done under controlled conditions to test a hypothesis is an inquiry.

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?