Ineed with questions 40 and 41 and #40 is what is a common feature of both the walnut and the oak? #41 is which tree is not shown in the diagrams? and it’s very hard and i’m struggling with it and if you need to see the picture big then click on it and it will be big

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?