Normally, neurospora can synthesize all 20 amino acids specified by the genetic code. a certain strain of this mold cannot grow in minimal nutritional medium but grows only when the amino acid leucine is added to the medium. this strain

mutation affecting the biochemical pathway leading to the synthesis of leucine.

Explanation:

According to my research on studies conducted by various biologists, I can say that based on the information provided within the question this strain has a mutation affecting the biochemical pathway leading to the synthesis of leucine. Since a mutation is a permanent alteration in the DNA sequence, thus changing its affects.

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"a scientist studying a whale and its surroundings would need to understand the structure of atoms in case something was negatively affecting the whale or its surroundings."

explanation:

this was from the link provided:

the actual answer was 160934