Unlike identical twins, fraternal twins
a. result from two eggs fertilized by different sperm.
b. result from the same fertilized egg.
c. are always the same sex.
d. are produced from two identical embryos

How are gross production and net production different? a. net production is always greater than gross production. b. net production is always less than gross production. only animals have net production. d. only plants have net production. select the best answer from the choices provided

Which nucleotide component contains nitrogen

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction