Which structure is thick to protect some of the reproductive structures in flowers

Two critical interventions to turn around the opioid crises are:

Error analysis: what might be the reason that some of your percentages didn't exactly match your predicted results? gametes aren't responsible for inheritance. mice don't have large litters, so the sample size was not large enough. the wrong type of mice were used.

Are the layers of rock above and below the coal older or younger?