Which of the following provides the best comparison between fish and birds?

they are both ectothermic, but fish have streamlined bodies and birds are bipedal.

they are both vertebrates, but fish are ectothermic and birds are endothermic.

they both lay eggs, but fish are jawless and birds have gizzards.

they both have two-chambered hearts, but fish have scales and birds have feathers

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

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d