The mathematical expression for the change in free energy of a system is δg =δh - tδs. which of the following is (are) correct?
a) δs is the change in enthalpy, a measure of randomness.
b) δh is the change in entropy, the energy available to do work.
c) δg is the change in free energy.
d) t is the temperature in degrees celsius.

Put the following processes of protein synthesis in the correct order: - dna strands unwind and separate - mrna copies dna according to complimentary base pairing - trna's anticodons bring amino acids to the corresponding mrna codons - amino acids bind to each other making a protein - mrna leaves the nucleus - a stop codon is reached, the newly formed protein is released to go do its job for the cell

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.