What is a mutation? why are mutations more serious when they occur in a sex cell?

A mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene.

Mutation in sex cells are more serious because they are heritable and affect the next generation.

substitution is the answer in this case

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls