Answer:
c. warms slowly, but holds heat longer
The cell wall contains not only cellulose and protein, but other polysaccharides as well. The cell wall provides structural support and protection. Pores in the cell wall allow water and nutrients to move into and out of the cell. The cell wall also prevents the plant cell from bursting when water enters the cell.
Answer:
minerals (calcium and phosphorus)
Absolute time measurements can be used to calibrate the relative time scale, producing an integrated geologic or <em>"geochronologic"</em> time scale. The overall duration and relative length of these large geologic intervals is unlikely to change much, but the precise numbers may "wiggle" a bit as a result of new data.
