What organs filter the blood and produces nitrogenous waste

Which of the following wires has the lowest resistance? A.) a long, thick copper wire at 35 °C B.) a short, thin iron wire at 25 °C C.) long, thin copper wire at 35 °C D.) a short, thick copper wire at 25 °C

Which structure transports water and nutrients from Roots to the next of the plant

Describe how fossils provide evidence of evolution

What is a cell with two pairs of each set of chromosomes

What is the biggest source of air pollution?

Suppose a population of rabbits is introduced to an environment that has hot summers and extremely cold winters. Every winter, many rabbits die because of the cold and the lack of food. The rabbits have a range of ear sizes.

True or false: when individuals of a parent species are separated geographically, one population of separated individuals is more likely to acquire neutral mutations than the other.

What society needs were addressed by science in the ancient world?

Should the FDA should give Aquabounty permission to grow and sell transgenic salmon? Why or why not?

How do the number of chromosomes in a female scorpion's egg cells (gametes) compare with the number in her body (somatic) cells?