How did primitive heterotrophs produce energy? A. Aerobic respiration
B. chemical fermentation
C. photosynthesis

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?

Read the sentence. “yesterday we arrived late for the outdoor concert in the city gardens.” which words in the sentence are adverbs? a. late; city b. yesterday; outdoor c. yesterday; late d. outdoor; city

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?