Which statement about the kidney and water is correct?

the kidney removes some water from the blood by filtration, after which water is not reabsorbed.

the kidney first removes some water from the blood by reabsorption, and then returns water to the blood by filtration.

the kidney removes water from the blood by reabsorption only; water is not removed by filtration.

the kidney first removes some water from the blood by filtration, and then returns water to the blood by reabsorption.

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity

What type of competition exsist between two species. turtles and fish

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen