The kidneys remove which cellular waste product from blood?
a. undigested food materials
b. carbon dioxide
c. urea
d. oxygen

Which is an example of a decomposer? a. bear b.algae c.grass d.bacteria d bacteria

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above