At one time, scientists proposed a principle called the central dogma. This principle stated that in the body, a chemical substance called DNA contains information. This information passes from DNA to RNA, but not from RNA to DNA. Then in 1970, scientists proved that some types of RNA can transfer information to DNA. What can you conclude from this information? a
Scientists have made many life-saving discoveries.
b
Scientists work together to advance scientific knowledge.
c
Scientists often respond to what they see as needs in society.
d
Scientists may find new information that causes them to modify their ideas.

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food