Why are mutations that alter the amino acid sequence usually harmful?

The give alter initial amino acid sequence.

Explanation:

Mutation is sudden heritable change in DNA sequence it can be inherited from parents by offspring. When mutation affects DNA sequence it could bring about deletion of important base sequence, insertion of new base sequence or frameshift leading to formation of entirely new base sequence and amino acid. This new sequence is a mutation and it could give rise to abnormalities in the body system. Evolutionary changes is as a result of accumulation of mutations, aneamia is also an example of mutation in human.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.