Down syndrome is a condition in which the individual

a. has three copies of chromosome 21.

b. has three copies of chromosome 23.

c. lacks chromosome 46.

d. has only one chromosome 21.

After a subtotal gastrectomy a client is returned to the surgical unit. Which is the best nursing action to prevent pulmonary complications? 1. Ambulating the client to increase respiratory exchange2.

Why do fish have gills

two students are discussing natural selection in bacteria and how it can relate to antibiotic resistance in bacteria

Why are valves found in veins, but not in capillaries or arteries?

What would mostly likely to happen if green plant exposed to less sunlight?

Many virues infect only a certain type of cell because they bind to certain

What can be bio-genetically grow tissues and organs

Whole muscles can respond in a graded fashion to stimuli by varying Select one: a. the force of contraction of individual muscle fibers. b. the number of motor units recruited. c. the amplitude of the action potential. d. the frequency of stimulus.

Why does the oxygen atom in water a molecule have a negative charge

What is continental crust and ocean crust composed of