Unlike exoskeletons, endoskeletons a. protect the animal well. b. need to be molted. c. are relatively heavy. d. can grow as the animal grows.

In an hydrogen ion pump the energy is used to join small molecules together to make larger ones which factor most likely has the greatest effect on the number of molecules mitochondria can produce

Kidney stones are tiny crystals of calcium or magnesium that block the narrow sections of the excretory system. which symptoms would a person with kidney stones experience? a. inability to store urine; pain in the bladder b. inability to store urine; pain in the urethra c. reduced urine flow; pain in the bladder d. reduced urine flow; pain in the urethra

Malaria is caused by which type of microorganism? a. fungi b. bacteria c. protozoa d. worms