Whitch of the following is a geographical limit?

Tempature
soil quality
Mountain
Population density

Which element is found in both dna and proteins

How does a lytic infection differ from a lysogenic infection?

The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an