Explain why your enzyme activity and pH results make sense for human lactase. To earn full credit you should reference pH in the human small intestine (in particular the duodenum where lactase is active) and explain in terms the structure and function of lactase.

9. wind power creates pollution. water air soil noise

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

In pea plants, the allele for inflated pod seed, i, is dominant over the allele for constricted pod seed, i. the punnett square shows a cross for this trait. which offspring will be homozygous dominant