What challenges do scientists face when classifying a new fossil?

Arrange the events in the order they would have occurred according to the theory of endosymbiosis.

Explain how advances in scientific knowledge have influenced society.

Two patients are being seen for pneumovax revaccination. the first patient is 66 years old, a known diabetic, and received the first dose of the vaccine at age 60.

When a person receives a vaccine, his or her body a. receives antibodies against a specific pathogen. b. creates plasma cells that can produce antibodies against the specific pathogen. c. creates antigens to fight the specific pathogen. d.

explain why and organisms my role is important for a community

Scientists were able to determine the age of the earth from rock samples that were analyzed. What technique was used to do this

How does the human heart organization relate to cells? To organ systems?

Why could a diet low in carbohydrates be dangerous?

What is a pathogen free environment

which object would take the most force to hold up in the air? A. a bus B. a chair C. a balloon D. a nail