You are walking to school when you encounter a strange barking dog. you tense up and contemplate whether you should run away. which nervous system is responsible for this "fight or flight" reaction?

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

What was the purpose of mendel's experiments with dihybrid crosses? a. to determine if dna was a transforming factor b. to determine if traits could be recessive c. to determine if traits affected each other d. to determine if traits had more than one allele

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart