Which two elements are always found in amino acids?

A nitrogen and sulfur

B carbon and oxygen

C hydrogen and phosphorus

D sulfur and oxygen

Which observation would provide indirect evidence that supports a hypothesis that the bubbles are o2?

What are the two recognized means of preventing injury during electrical equipment operation?

How are all humans similar?

Which best describes primary succession?

Question 1 of 7 Multiple Choice Which level of organization does the complete skeleton of a mouse belong to? A. cell B. a tissue C. an organ D. an organ system

If a water well is actively pumped, the water table will * O be raised around the well O stay at the same level as before pumping O be depressed around the well O be recharged

Proposed answer to a scientific question that A. can be rejected B. is testable C. both a & b

In which list are the levels of organization in the human digestive system shown from lowest to highest?

Splitting cells involves creating a single by combining two or more

Think about the sources you would use to get information about scientific ideas. Which sources would you avoid? Check all that apply. a magazine an encyclopedia a scientific journal an advertisement a TV show