In animal cells the main microtubule organizing center (or centrosome) is important in cell division
__________________ Indicate whether the statement is true or false.
True
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Which of the following is not true of sponges?
A. Mesohyl is mostly noncellular and provides structural support. B. Choanocytes have flagella that beat in a coordinated fashion. C. Sponges are among the most primitive organisms to have developed reproductive organs. D. Gas exchange of oxygen and carbon dioxide occurs through diffusion.
Avery used the enzyme _______ to remove the proteins from the cell extracts
A. protease B. DNase C. RNase D. All of the answers are correct
How is most carbon dioxide transported in the blood?
A. on the free hemoglobins since they have lost their oxygen in the tissues B. as bicarbonate ions (HCO3) C. as carbon monoxide D. as carbon compounds and oxygen radicals E. as gas bubbles of CO2, just as in carbonated soft drinks
The splicing of any two genes together is considered gene
a. disruption. b. fusion. c. knock out. d. probing.