In a living organism, what is an organ?
functional unit, or building block, of all organisms; smallest unit that can carry on the activities of life
the shell or skin of an organism
a structure composed of a number of tissues that work together to perform a specific task
a group of similar cells that perform a common function

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy

Consider this plant cell which organelle is labeled g