The need for energy, gained by respiration and photosynthesis, is the driving force of the oxygen cycle.
a. true
b. false

Which identifies the main purpose of biological taxonomy?

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 best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome