Ineed with questions 16-21 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

16) 2 servings (4percent Times 2 is 8percent)
17) D; it’s the only choice that can’t be backed up by just looking at the chart
18) A cell wall
19) either A or D but I’m pretty sure it’s D because they help the soil
20) D metabolism
21)c chromosomes because eggs and sperm have 23 chromosomes

21 just playing hshsjsjshsgdhdhdhhd