Tubular reabsorption of water, nutrients, and sodium begins in the ____.

A) glomerulus
B) proximal tubule
C) distal tubule
D) loop of Henle
E) collecting duct

Which sequence correctly lists the different levels of biological organization, from the smallest and simplest to the largest and most complex?

A) cells-organs-tissues-organ systems-organism
B) cells-tissues-organ systems-organs-organism
C) tissues-cells-organs-organ systems-organism
D) tissues-organs-organ systems-organism-cells
E) cells-tissues-organs-organ systems-organism

Which substance is removed from the body via a system other than the urinary system?

A) uric acid
B) salt
C) feces
D) bicarbonate
E) urea

Which of the following is a characteristic of uracil?

A) It has the ability to bond with adenine.
B) It has the ability to bond with guanine.
C) It is a purine.
D) It has the ability to bond with cytosine.
E) It contains two nitrogenous rings.

A root cap:

A) protects the fragile meristematic cells at the root tip.
B) pushes the root tip deeper into the soil.
C) protects the cells located in the lateral meristem.
D) arises from the stem apical meristem.
E) will differentiate into primary tissues of the adult plant.