D.) Esophagus. The esophagus carries food from the mouth down to the stomach.
<h2>Answer:</h2>
Following are the four combinations of active or inactive regulatory proteins that could be present anytime in the cell:
- Active repressor , Active activator
- Active repressor, Inactive activator
- Inactive repressor, Active activator
- Inactive repressor, Inactive activator
Answer:
Yes.
Explanation:
The nucleus is present in both animal and plant cells.
B. Resistance is the tendency for materials to oppose the flow of electric charges.
