Metastatic cancer cells:
A. are able to leave the tumor where they
originated and travel to distant locations to
set up new tumors at distant sites.
B. have lost their adhesion to the extracellular
matrix, freeing them from being confined to
the original tumor.
C. become malignant when they cross the
capillary basal lamina.
D. only need to cross a single layer of
capillary endothelial cells to form tumors at
distant sites.
E. All of these choices are correct.
A
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The Soviet chemist Oparin suggested that for organic molecules to form on Earth, the atmosphere was probably rich in
A. argon. B. oxygen and water. C. hydrogen. D. oxygen. E. helium.
The smallest and most significant taxon is a ________.
A. species B. genus C. family D. phylum E. kingdom
The barrier between the intracellular and extracellular fluid compartments in an animal or plant is the:
A. walls of capillaries. B. membrane of the endoplasmic reticulum. C. plasma membrane. D. nuclear membrane. E. membrane of the Golgi apparatus.
The ability of bread to rise is mainly a function of the CO2 produced anaerobically during oxidative phosphorylation.
Answer the following statement true (T) or false (F)