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What is the mass number of an atom of potassium that has 20 neutrons? A) 15 B) 19 C) 35 D) 39 E) 59

_______ is a process of nuclear division in which the number of chromosomes in certain cells is halved during gamete formation.

The enzyme that catalyzes the synthesis of new DNA molecules is called

Q12.  Approximate the logarithm to 3 decimal places. log315

The key point in Darwin’s proposal is that the ___________ imposes the conditions that determine the direction of selection.

DNA can be cleaved at specific sites, generating smaller DNA fragments with short single-stranded ends. The chemical tool used to cleave the DNA is called a(n)

Q9.  Find all the rational zeros.    f (x) = 4×4 + 9×3 – 34×2 – 25x – 4

Q4.  Solve the problem.Factor f (x) = 3×3 – 2×2 – 53x – 60, given that 5 is a zero.

On a hot day, the thermometer reads 95 °F. What is the temperature in degrees Celsius? A) 77 °C B) 113 °C C) 35 °C D) 63 °C E) 178 °C

Q3.  Find the zeros of the function and state the multiplicities. f (x) = – 2×6(x – 7)2(x + 5)6