Cell culture is used to grow _________ in the laboratory.

All viruses have a viral envelope.

Nucleocapsid is present in both enveloped and naked viruses.

Tail fibers are seen in:

In a 1947 speech to Congress, the American president set out his policy of support for the resistance of “free peoples” to communism by tying politics to economics; it would be a choice between “two ways of life.” This policy was known as the ________ Doctrine.

The ________ were religious fighters who gained their reputation by fighting against the Soviet Union in Afghanistan.

The ______ president Anwar Sadat supported coexistence with Israel.

Following the Spanish-American War, the United States annexed

Two naval battles of 1942 fought by aircraft operating from each side’s carriers, marking the extent of Japanese expansion and demonstrating American supremacy in both air and sea, were

The most important “second front” opened by the Allies in Europe was created in June 1944 with the