Select the correct answer from each drop-down menu. humans use many chemical substances for farming that consequently affect biodiversity. these compounds, which are rich in nitrogen and phosphorus, are used to fertilize crops. excessive use of these compounds causes , which leads to in bodies of water.

Name the type of chemical that speeds up digestion

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?