Read the incomplete list of steps below, which shows how the excretory system maintains homeostasis. 1. nephrons in the kidneys remove waste and necessary materials from the blood. 2. ? 3. waste is eliminated from the body. which best describes what happens in step 2? water and glucose are returned to the blood. water and glucose are eliminated from the body. necessary materials leave the body through urethra. necessary materials are broken down into smaller nutrients

your answer should be c) enjoy!

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

which

what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements