What percentage of earth’s water is usable fresh water?

Classify the structures as homologous or analogous, depending on their structure and function.

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

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion