Which of the following qualifies as point-source pollution? a. a sewer pipe dumping raw sewage into a stream
b. fertilizer runoff from agricultural fields
c. exhaust from vehicles in a county
d. solid waste from consumers in a city
e. pollutants emitted by power plants in a region

92 sathe best for the question 11. most animals and plants reproduce sexually. this means that dna is passed down to new organisms from two parental organisms. which of the following is a key advantage of sexual reproduction?

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?