Which of the following are called bone-building cells and secrete the components of the matrix?
A. Red marrow
B. Osteoblasts
C. Osteocytes
D. Osteoclasts
E. Yellow marrow
Answer: B
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Cowbirds have inflicted significant damage on native North American songbirds by ________
a. introducing diseases such as avian malaria b. mobbing nesting birds and eating the eggs when the parents are chased away c. displacing them from nesting sites d. nest parasitism, laying eggs in the nests of other species
What cetacean behavior is associated with establishing bearings in coastal waters?
a. Breaching b. Tail slapping c. Spy hopping d. Head lunging
Hormones are distributed throughout the body by the ____ system
a. urinary b. lymphatic c. nervous d. circulatory e. muscular
Different chemotherapeutic drugs can do each of the following except
A) inhibit metabolic pathways required for DNA synthesis. B) chemically cross-link DNA strands. C) inhibit DNA topoisomerases required for DNA replication. D) disrupt spindle microtubules. E) Chemotherapeutic drugs can do all of the above.