Paragraph 1 The reaction was acidified, causing the release of carbon dioxide. Next, some carbon dioxide was evacuated from the flask. Return to Test Yourself: Using Both Indefinite and Definite Articles
Paragraph 1
The reaction was acidified, causing the release of carbon dioxide. Next, some carbon dioxide was evacuated from the flask.
Return to Test Yourself: Using Both Indefinite and Definite Articles
Paragraph 2 Jenny poured some gels to use for electrophoresis. The gels were composed of two different concentrations: 8% and 12%. The 8% gels were placed in [a or the] cold room overnight. Return to Test Yourself: Using Both Indefinite and Definite Articles
Paragraph 2
Jenny poured some gels to use for electrophoresis. The gels were composed of two different concentrations: 8% and 12%. The 8% gels were placed in [a or the] cold room overnight.
Paragraph 3 Some investigators have not yet enrolled enough patients in the clinical trial. The tardy investigators will be notified by fax. Return to Test Yourself: Using Both Indefinite and Definite Articles
Paragraph 3
Some investigators have not yet enrolled enough patients in the clinical trial. The tardy investigators will be notified by fax.