Bacteria colonizing the body are necessary for proper development. A germ-free animal displays
A) regenerative diseases of the intestinal tract.
B) overdevelopment of immune system.
C) presence of dental caries.
D) heightened sensitivity to enteric pathogens and fungal infections.
Answer: D) heightened sensitivity to enteric pathogens and fungal infections.
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What is the main structural component of plants?
a. glucose b. glycogen c. chitin d. cellulose e. starch
A dendrite of a sensory neuron is classified as a(n) ____
a. free nerve ending b. encapsulated receptor c. sensory receptor d. sensory stimulus e. tertiary sensory neuron
Much of the work of breaking down the food we ingest is done by our
(a) stomach (b) teeth (c) gut microbiome (d) esophagus
The number of cells in the different phases of a population can be determined most easily by using a(n) _______ to measure the amount of DNA per cell in a large sample of cells.
a. scintillation counter b. flow cytometer c. fluorescence microscope d. phase-contrast microscope after autoradiography