Organisms whose cells lack a nucleus are called
A) prokaryotes
B) eukaryotes
C) non-nucleotes
D) karyokes
A
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The electric arc furnace uses ___________% scrap steel.
Fill in the blank(s) with the appropriate word(s).
X-Ray Diffraction: The lattice spacing of the principal Bragg planes in sodium chloride is 0.282 nm. For what wavelength of x-rays will the first order reflected beam diffract at 55° with respect to the normal to the crystal planes?
A. 0.323 nm B. 0.530 nm C. 0.662 nm D. 0.150 nm E. 0.462 nm
Nellie pulls with a force of 50 N on a horizontal rope tied to a tree at rest. The net force on the rope is
A) 50 N and rope tension is 0 N. B) 50 N and rope tension is also 50 N. C) zero and rope tension is 50 N. D) zero and rope tension is also zero.
Which of the following is another term for widget?
A. thingamabob B. gidget C. gadget D. sandbox