Multiple ChoiceLeaves occur at intervals along the plant stem. What is the region where a leaf is attached to the stem?
Multiple ChoiceThe shoot system of a prickly pear cactus consists of broad paddle-like structures covered with clusters of spines. The spines are modified leaves, so the flat green paddles must be modified versions of what structure?
Multiple ChoiceA cross section of a plant part exposes epidermis, a thick cortex, and a central cylinder of xylem and phloem. This part is a __________.
Multiple ChoiceIn most leaves, chloroplast-containing cells are most closely compacted in the __________.
Multiple ChoiceWhich of the following is the correct arrangement of structures from the inside to the outside of a leaf blade?
Open QuestionCreate 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.
Open QuestionWhich 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.
Open QuestionResearchers 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?