Food is digested and then delivered to body cells. Which of these describes how the cells respond?

Jorge is studying the digestive system. He found research indicating that more bacteria live in the large intestine than there are cells in the human body. Based upon this research, can Jorge logically conclude?

Scientists in Mississippi have discovered that coyotes, bobcats, and raccoons hunt wild turkeys. Which of the following explains the relationship between these animals?

Which of these describes how the absence of mitochondria would affect a cell?

Which of these is an example of selective breeding?

Scientists found an organism that can live without water for long periods of time. The scientists made copies of its DNA,then injected this new DNA into corn. Which of these describes the process the scientists used?

Schistosomiasis is a disease that occurs when eggs of small flatworms hatch inside the body. The worms can grow in many different tissues. How could schistosomiasis in the intestines interfere with normal body functions?

Some scientists are working on ways to save energy and reduce the price of energy in the future. Which of the following research efforts will help meet this goal?

Which of these is one of Newton’s laws of motion?

Which motion causes night and day on Earth?

Astronomers often try to find the hottest stars in our galaxy. Which wavelength of radiation do astronomers use to detect these hottest stars?

Which of these describes the lithosphere?

Which of these describes the lithosphere and the asthenosphere?

Which of these describes a divergent boundary?

Which of these is a renewable energy resource that does not produce carbon dioxide?

Scientists are studying the use of vegetable oil as an automotive fuel. Which of these is a logical justification for continuing this research?

Astronomers often try to find the hottest stars in our galaxy. Which wavelength of radiation do astronomers use to detect these hottest stars?

Scientists at a research center are studying plants that have a natural resistance to insects. Which of these is a logical justification for continuing this research?

Why are multiple trials conducted during an experiment?

Why is one variable tested at a time during scientific investigation?

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