Which of the following mutations could lead to constitutive expression of the genes of the lac operon?

a mutation in the lac-z gene
a super repressor mutation
a mutation in the operator sequence
a mutation in the lac-y gene

What is an endocrine function? (apex) a.esophageal glands release mucus into the esophagus b.salivary glands release saliva into mouth c.swear glands release sweat to the skin d.the pineal gland releases melatonin into the bloodstream

Where are the strongest jet streams located?

Vessels draining the myocardium of the heart, open primarily ,into which chamber?