Two water molecules are pictured above. The bond between the O and H in one water molecule (bond 1) is a(n) [a] bond. This bond results in [b]. The bond that occurs between two water molecules (bond 2) is a(n) [c].

In a population, the observed and expected numbers of different genotypes are shown in the table below. The observed and expected are significantly different. Which of the following explanations is consistent with these results? expected number observed number HH 114,000 119,000 Hh 249,000 241,000 hh 135,700 140,000  

A type of plant has a gene for a protein that causes the plant to produce a chemical in its leaves. R1R1 plants produce a high concentration of the chemical; R1R2 plants produce moderate concentrations of the chemical, and R2R2 plants do not produce the chemical.   The relative fitnesses of each genotype are shown in the table below.  The population is very large – 5,000,000 individuals – and 25% of them currently produce the functional protein. genotype phenotype relative fitness R1R1 high concentration of chemical 0.70 R1R2 moderate concentration of chemical 0.85 R2R2 no chemical 1.0 Based on this, what can we predict about the evolution of this trait (chemical production) as a result of natural selection if the conditions remain the same as they are now?

In the life cycle of a diploid organism (for example, a diploid animal or diploid plant), meiosis will always produce __________.

How does fermentation enable a cell to produce ATP in the absence of oxygen?

What information would be the most useful for predicting the type of bond that would form between two atoms?

Refer again to the diagram in the previous question. Which of the following functional groups are present on molecule 2? Choose all that are present.

An mRNA sequence starts off with 5′ – A C C G U G A U G U C C G U C G C A … 3′. Following the “rules” for reading mRNA, what will be the first four amino acids in the protein this mRNA codes for? [c] The primary structure of a polypeptide is synthesized based on the information in the mRNA by [z]. The molecule responsible for matching an amino acid to its codon is [b] A point mutation changes a codon from 5′ UGG 3′ to 5′ UGU 3′. What would be the impact of this mutation on the protein produced from the mRNA? [d]

The human perception of the frequency of a sound wave is called:

Sound waves are classified as: