D A. Flies B. Birds C. Ants D. Beetles E. Bees 12. A A. parenchyma B. phloem C. companion cell D. vessel elements E. vascular cambium 25. B. ethylene C. phytochrome D. cytokinin E. abscisic acid 29. The best way to accelerate fruit ripening at home would be to put unripe fruit in a cool, dark place F. 40. Most plants have mycorrhizae T 44.
Grasses are unusual angiosperms because they lack flowers and fruit.
Auxin increases plant growth by stimulating cell elongation T 46. Xylem can remain functional for many years but phloem usually is active for just one year. Bird-pollinated flowers are scentless T 50. Male ginkgo trees are too stinky to plant F 51.