What is structure 3, and how does it help sustain life?
O A. Structure 3 is the nucleus, which is the control center of the cell.
O B. Structure 3 is a mitochondrion, which is the site of cellular respiration.
O C. Structure 3 is a chloroplast, which is the site of photosynthesis.
O D. Structure 3 is the cell wall, which gives the cell structural support.

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist

Which of these is an example of structural protein in plants