How long does the bony callus in a bone repair last?
A. 1-2 days
B. 1-2 years
C. 3-4 months
D. 3-4 weeks
E. more than 10 years
Answer: C
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All of the following correctly describe the fate of the embryonic layers of a vertebrate EXCEPT
(A) neural tube and epidermis develop from ectoderm (B) linings of digestive organs and lungs develop from endoderm (C) notochord and kidneys develop from endoderm (D) skeletal muscles and heart develop from mesoderm (E) reproductive organs and blood vessels develop from mesoderm
If a diploid cell goes through meiosis it will generate
a)two haploid cells. b)four diploid cells. c)two diploid cells. d)four haploid cells. e)This is not possible.
The number of species in a community is called species
A) diversity. B) richness. C) composition.
Describe the cancer stem cell hypothesis. How might this explain the inability of traditional cancer treatments such as radiation and chemotherapy to completely eradicate tumors?
What will be an ideal response?