Blood Brain Barrier (BBB) is capillary network that is consisted of pericyte, (i)___________, and (ii) _____________.
a) (i) astrocyte (ii) endothelial cell
b) (i) neuron (ii) endothelial cell
c) (i) astrocyte, ii) oligodendrocyte
d) (i) oligodendrocyte, (ii) endothelial cell
Answer: a) (i) astrocyte (ii) endothelial cell
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Which of the following is NOT a source of
heritable variation in traits among individuals of a population?
a. mutation b. crossing over c. independent assortment d. fertilization e. mitosis
Which of the following is evidence that the
continents are not static?
a. the jigsaw puzzle fit of continents like South America and Africa b. fossils occur in identical rock formations on both sides of the Atlantic Ocean c. magnetic poles of large rock formations point in different directions d. at certain places beneath the ocean, the sea floor is spreading e. all of these are evidence that the continents are not static
Which disorder is the result of a bacterial infection that destroys patches of lung tissue and can also spread to other
body parts? a. pneumonia b. influenza c. tuberculosis d. lung cancer e. emphysema
Crossing over is one of the most important events in meiosis because
A) homologous chromatids must be separated into different daughter cells. B) homologous chromosomes must be separated into different daughter cells. C) the number of chromosomes allotted to each daughter cell must be halved. D) it produces new arrays of alleles on chromosomes. E) All of the choices are correct.