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Problem 1
Where in an angiosperm would you find a megasporangium? a. in the style of a flower b. enclosed in the stigma of a flower c. within an ovule contained within an ovary of a flower d. packed into pollen sacs within the anthers found on a stamen
Problem 2
Key features of seed plants facilitating life on land include three of the following four traits. Select the exception. a. homospory b. pollen c. reduced gametophytes d. seeds
Problem 3
With respect to angiosperms, which of the following is incorrectly paired with its chromosome count? a. egg—n b. megaspore—2n c. microspore—n d. zygote—2n
Problem 4
Which of the following is not a characteristic that distinguishes gymnosperms and angiosperms from other plants? a. dependent gametophytes b. ovules c. pollen d. alternation of generations
Problem 5
Gymnosperms and angiosperms have the following in common except a. seeds. b. pollen. c. ovaries. d. ovules.
Problem 6
DRAW IT Use the letters a–d to label where on the phylogenetic tree each of the following derived characters appears. a. flowers b. embryos c. seeds d. vascular tissue
Problem 7
EVOLUTION CONNECTION The history of life has been punctuated by several mass extinctions. For example, the impact of a meteorite may have wiped out most of the dinosaurs and many forms of marine life at the end of the Cretaceous period (see Concept 25.4). Fossils indicate that plants were less severely affected by this mass extinction. What adaptations may have enabled plants to withstand this disaster better than animals?
