This is a cell, which is the basic unit of all life. all organs in human bodies are made of cells and require oxygen to survive. which two systems work together to deliver oxygen to cells throughout the body?

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

What are the choices?

Gamma waves is the answer