Ddt was banned from use as a pesticide in the united states because a. it caused the eggs of fish-eating birds to become thin and fragile. b. it was washed by rain into streams, rivers, lakes, and ponds. c. it was ingested by fish and other aquatic animals. d. all of the above.

Which of the following is one of the four conditions necessary for natural selection to occur in a population? fewer organisms are born than the habitat can support mutation does not occur organisms have identical characteristics variation is inherited

Abeaker of water was heated and then placed on a bench in the laboratory. the water cooled until it was the same temperature as the air in the laboratory. which of these explains the mechanism by which the water cooled? a. heat energy was transferred from the water to the air. b. water molecules from the water formed warm water currents. c. the water molecules absorbed energy from the molecules in the air. d. the water released radiation until it contained no heat energy.

Which is a major genetically modified crop in the united states?