What element do all organic compounds contain?

Nitrogen

Oxygen

Carbon

Hydrogen

A scientific hypothesis can become a theory if A. the entire scientific community accepts it. B. the hypothesis is tested extensively and competing hypotheses are eliminated. C. there are no other competing hypotheses. D.

Maria is concerned because she has been exposed to a small amount of radiation during an X-ray. What is her doctor most likely to tell her

What is the scientific definition of energy? A. the ability to use the stored potential of an object B. the ability to use the change in direction of an object C. the ability to use an applied force in order to make an object move D.

What would happen to the electron transport system (ETS) and oxidative phosphorylation pathway in the presence of excess NADH if the mitochondrial matrix were not closed, but opened up to the cytoplasm?

What are the main organs/parts involved in the circulatory system

Enzymes are part of chemical or mechanical

New technology, such as more effective irrigation techniques, could benefit society by

Which statement about sister chromatids is true? One sister chromatid is inherited from each parent. Sister chromatids are always in every cell. Sister chromatids are used only for reproduction. Each sister chromatid forms a lobe of a chromosome.

Select all that apply: Which of the following affect (s) the half-life of a radioactive substance? A. the type of isotope B. the temperature of the substance C. the addition of a catalyst D. the mass of the substance

Which of the following two statements describe benefits of bio technology in medicine 1. using stem cells to treat disease 2. using antibiotics to treat infection 3. diagnosing genetic diseases 4. producing antibodies such as antitoxins 5.