Are a goup of cells that work together to perform a specific function.

What is During the removal of wastes in a cell, the waste products move

Which of the following are the smallest organisms in the ocean, and largely responsible for the generation of our oxygen?

Consider the order of organs in the digestive system and their positions in the body. Why do you think digestion is more efficient if you are sitting up, rather than slumped over or lying down?

In the video, Craig Venter says, "We are trying to understand basic life, by learning how to now write the genetic code.

Nerve impulses travel along the long cellular extension of the neuron called the

Body composition is affected by two factors - the number of calories eaten (energy in and the amount of activity performed and calories burned (energy out. body composition is maintained by:

Which body system rapidly communicates information using electrical signals? A. Endocrine B. integumentary C. Nervous D. Respiratory

Microorganisms that cause disease are classified as

Procaryotes are distinguished from eukaryotes on the basis of what structure? (More than one answer is correct) a. a membrane-bound nucleus b. plasmid DNA c. RNA molecules d. presence of mitochondria or chloroplasts

Many higher organisms must maintain a strict internal temperature. There can be serious consequences if the internal temperature deviates even slightly.