All of the following are characteristics of birds' bones except:
a. many have air spaces
b. many are fused together
c. the breastbone is minimized
d. they are strengthened by struts within the bone

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

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