GIVING 50 POINTS AND BRAINLIEST TO CORRECT ANSWER What important events happen during the Krebs cycle? (Chose all that apply)

releases energy in the form of FADH2 and NADH

uses oxygen to form carbon chains and store energy

breaks down oxygen molecules to produce ATP

builds up and breaks down carbon chains

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.