Problem 14
Tree rings occur mainly __________ a. when there are droughts during the time the rings form b. where environmental conditions influence xylem cell size c. as epidermis replaces periderm
Problem 15
Match the terms with the best description. mesophyll potato cotyledons parallel veins vascular cylinder wood transpiration sieve plate taproot a. separates cells in phloem tubes b. photosynthetic parenchyma c. evaporation from stomata d. characteristic of monocot leaves e. only one in a monocot seed f. only in eudicots g. stem structure h. mass of secondary xylem i. central column in roots
