Growth areas of an angiosperm are called:
A) apical meristems. B) root caps. C) ground tissue. D) cuticles.
Answer: A
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What is the physiological cause of a heart attack?
A) rupture of coronary arteries B) a blood clot moving through the heart C) a blood clot lodging in a blood vessel supplying the heart D) scar tissue in the heart muscle
You are asked to give a classroom demonstration of DNA supercoiling. To do so, you take two different colored pieces of rubber tubing, twist them very tightly and excessively around each other and join the ends of the tubing appropriately. Next, you relieve the supercoiling by breaking one strand and unwinding it. In this demonstration, the breaking and unwinding to relieve the supercoiling simulates the action of
A. polymerases. B. exonucleases. C. primases. D. topoisomerases. E. ligases.
A mass in the right mandibular angle is misdiagnosed as a cervical/pharyngeal cyst. A biopsy of the cyst shows whorls of epithelial reticular cells (Hassall's corpuscles). What is the correct diagnosis of the cyst?
A. Adenocarcinoma B. Benign hypertrophy of glandular tissues C. Chondrocytes D. Ectopic thymus E. Osteoma of mandible
The process in which cells make proteins is called protein expression
a. true b. false