quiz 6 - All of the following are characteristic of...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
In terms of alternation of generations, the pollen grains of seed-producing plants are most similar to a fern gametophyte that will bear only antheridia. Which of the following most closely represents the male gametophyte of seed-bearing plants? pollen grain The sporophytes of mosses depend on the gametophytes for water and nutrition. In seed plants, the reverse is true. From which seed plant sporophyte structure(s) do the immature (unfertilized) gametophytes directly gain water and nutrition? sporangia Generally, wind pollination is most likely to be found in seed plants that grow in dense, single-species stands. Plants with a dominant sporophyte are successful on land partly because their gametophytes are protected by, and obtain nutrition from, the sporophytes. Before pollination occurs, what does an individual flower potentially have that an individual pine cone does not have? both male and female gametophytes
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: All of the following are characteristic of angiosperms except free-living gametophytes. If the "mostly male" hypothesis for the origin of flowers is correct, then the development of which gymnosperm structure below should be controlled by genes most similar to those that control the development of bisexual flowers? Microsporangium Which of the following statements is not true of monocots? The veins of their leaves are parallel to each other. They, along with the eudicots and basal angiosperms, are currently placed in the phylum Anthophyta. They are currently thought to be polyphyletic. They possess a single cotyledon. All of the statements are true. Which structure(s) must pass through the micropyle for successful fertilization to occur in angiosperms? A. one sperm nucleus B. the pollen tube C. two sperm nuclei D. both A and C E. both B and C...
View Full Document

Ask a homework question - tutors are online