Multiple ChoiceLeaves occur at intervals along the plant stem. What is the region where a leaf is attached to the stem? 1166views
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? 1615views
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 __________. 1361views
Multiple ChoiceWhich of the following is closest to the center of a buttercup (eudicot) root? 969views
Multiple ChoiceIn most leaves, chloroplast-containing cells are most closely compacted in the __________. 1261views
Multiple ChoiceWhich of the following is the correct arrangement of structures from the inside to the outside of a leaf blade? 930views