Some hereditary diseases prevent the development of functional ribosomes. Which process can be directly affected by defective ribosomes? a .DNA replication
b. Meiosis
c. Fertilization
d. Protein synthesis

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

the answer is b.) hydrogen bonds between bases.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.