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An unknown element has two naturally occurring isotopes with masses 18.00 amu (A) and 21.00 amu (B) and has an atomic mass of 18.90 amu.  What’s the natural abundance of isotope A (%)?  Mark your answer next to words “Final answer is”. You must follow significant figure rules.   You must show your work here to receive any credit (you may receive 0 points for only showing your final answer).

Choose the ground state electron configuration for Co3+.    

A solid gold cube contains 1.33×1029 atoms.  What is the volume of the cube in cm3? The density of gold is 19.3 g/cm3. Mark your answer next to words “Final answer is”. You must follow significant figure rules.   You must show your work here to receive any credit (you may receive 0 points for only showing your final answer).

What is selection in the context of animal breeding?

A greater probability of detection can be achieved with progeny and recessive gene frequency in the test mates.

What are the two basic tools of animal breeders?

If you have a weak correlation between two traits, what should you expect?

What are the three basic aspects of correlation?

What is covariance?

What does a high heritability value indicate?