19 Select the correct text in the passage.
Identify the effects of lead poisoning.
Sara lives in a densely populated region. The local government, in order to develop a plan for further development of that region, conducted a
survey. The survey revealed that many factories in that region emit harmful gases. There was deforestation on a large scale. Many people were
suffering from diabetes. The intelligence quotient in children was observed to be very low. Many dead fish were found in the river flowing
through that region.

Ry was studying two populations of the same species of lizards. one population lived on an island and the other lived on the mainland. both populations were affected by a hurricane that hit the island and the mainland with equal force. a year later, henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in the mainland species. which best describes a conclusion he might have reached? gene flow greatly affects small populations, but large populations can recover. genetic drift greatly affects small populations, but large populations can recover. gene flow greatly affects large populations, but small populations can recover. genetic drift greatly affects large populations, but small populations can recover.

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

Explain how organisms could be harmed by high levels of salt from roadways?