What accounts for about 90% of a plant cell's expansion?

A cross section of a plant part exposes epidermis, a thick cortex, and a central cylinder of xylem and phloem. This part is a __________.

Which of the following is closest to the center of a buttercup (eudicot) root?

In most leaves, chloroplast-containing cells are most closely compacted in the __________.

Which of the following is the correct arrangement of structures from the inside to the outside of a leaf blade?

What type of phyllotaxy minimizes shading of lower leaves?

Create a diagram or concept map that shows the relationships between the following: root system, root hairs, shoot system, leaves, petioles, blades, stems, nodes, internodes, flowers.

Which of the following is an important exception to the central dogma of molecular biology?a. Many genes code for RNAs that function directly in the cell.b. DNA is the repository of genetic information in all cells.c. Messenger RNA is a short-lived 'information carrier.'d. Proteins are responsible for most aspects of the phenotype.

Researchers design experiments so that only one thing is different between the treatments that are being compared. In the Hershey–Chase experiment, what was this single difference?