Mutations are always harmful happen when dna changes during replication cannot be acquired from the environment decrease the genetic diversity of a population

C I hope it helps...

happen when DNA changes during replication

Explanation:

Mutation refers to the change in the DNA of organisms. Mutations may occur upon exposure of individuals to certain mutagens, such as UV radiations, present in environment. Any error during DNA replication also leads to change in the DNA and mutations. Mutations add variations and increase the genetic diversity of the population. Mutations may be beneficial or harmful.

the bald eagle got 50 because everything gets 10% of what they consume and since 50 is ten % of 500 hundred that means the   grasshopper had to have consumed a plant with 5,000 calories of energy

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.