Biology: The Unity and Diversity of Life (Looseleaf)
15th Edition
ISBN: 9781337408417
Author: STARR
Publisher: CENGAGE L
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Chapter 27, Problem 14SQ
Tree rings occur _______.
- a. when there are droughts during the time the rings form
- b. where environmental conditions influence xylem cell size
- c. if heartwood alternates with sapwood
- d. as epidermis replaces periderm
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Chapter 27 Solutions
Biology: The Unity and Diversity of Life (Looseleaf)
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- Roots and shoots lengthen through activity at______ . a. apical meristems c. vascular cambium b. lateral meristems d. cork cambiumarrow_forwardLooking at the anatomy of a tree trunk, the part that greatly contribute to the welfare of humans specially in construction is _. a. heartwood b. secondary xylem c. secondary phloem d. A and Barrow_forwardThe activity of lateral meristems_____ older roots and stems. a. lengthens b. thickens c. both a and barrow_forward
- Newly-formed root cells begin to form different cell types in the ________. a. zone of elongation b. zone of maturation c. root meristem d. zone of cell divisionarrow_forward. Which of the following is not a typical plant response to oxygen deficit due to flooding? * A. Aerenchyma formation B. Hyponastic growth of submerged leaves C. Stomatal closure D. Induction of anaerobic stress proteinsarrow_forwardThe conducting tubes in a vascular cylinder are______ . a. endodermis d. xylem only b. pericycle e. xylem and phloem c. root cortex f. companion cellsarrow_forward
- Sieve tubes are part of_____ . a. cortex c. phloem b. mesophyll d. xylemarrow_forwardTracheids are part of ______. a. cortex c. phloem b. mesophyll d. xylemarrow_forwardwhich of the following concernig roost is incorrect? a. monocot roots exhibit primary grwoth and secondary growth b. dicots roots are called taproots c. dicots are called perennials because they exhibit secondary growth d. monoct roots form fibrous roots e. secondary growth causes the xylem and phloem to increase in diameter.arrow_forward
- The ______ is impermeable to passive water transport, and regulates what enters the xylem. Select one: a. meristem b. stomata c. palaside parenchyma d. guard cells e. casparian striparrow_forwardAll of the vascular bundles inside a typical______ are arranged in a ring. a. monocot stem c. monocot root b. eudicot stem d. eudicot rootarrow_forwardTypically, vascular tissue is organized as____ in stems and as____ in roots. a. multiple vascular bundles; one vascular cylinder b. one vascular bundle; multiple vascular cylinders c. one vascular cylinder; multiple vascular bundles d. multiple vascular cylinders; one vascular bundlearrow_forward
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