Which statement about ddt best shows how science has been impacted by society?
a. ddt led to insect resistance.
b. ddt was considered harmful and was replaced by other pesticides.
c. ddt was the first modern insecticide.
d. ddt was used in wwii to control malaria and typhus.

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )