The pH of the digestive tract is
A) low throughout.
B) basic in the stomach and acidic throughout the rest of the tract.
C) acidic in the stomach and neutral in the intestines.
D) high throughout.
E) neutral throughout.
C
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Damage to the substantia nigra, a specific region of the basal ganglia, can produce the resting muscle tremors characteristic of what disease?
A. epilepsy B. Parkinson disease C. seizures D. Alzheimer disease E. insomnia
Identify the correct steps and the correct order for cloning a gene of interest
1. Transform the bacteria. 2. Mix the postrestriction endonuclease gene of interest with the postrestriction endonuclease cloning plasmid. 3. Incubate the combined DNA fragments with the liagase enzyme. 4. Use restriction endonucleases to cut the gene of interest and the target DNA. 5. Spread bacteria on medium containing lactose and ampicillin. 6. Spread bacteria on medium containing X-gal and ampicillin.
a. 4, 2, 3, 1, 6 b. 4, 3, 2, 1, 5 c. 4, 3, 2, 1, 6 d. 4, 2, 3, 1, 5 e. 2, 4, 1, 5, 3
Microorganisms require small quantities of this nutrient for enzyme function and maintenance of protein structure.
A. macronutrient B. element C. water D. growth factors E. trace element
Compare the placement of eyes in an ostrich to that in an owl. What are the trade-offs in physical constraint that each faces?
What will be an ideal response?