BIOL1108 Exam 2 Questions & Answers. (A+ Guide)

BIOL1108 Exam 2 Questions & Answers. (A+ Guide)-1. In Figure 1, the modified leaf labeled X is a(n) bearing at its base a(n) containing 3 a. megasporophyll | megasporangium j megaspores b. megasporangium | archegonium | eggs c. microsporophyll | microsporangium | microspores d. strobilus | sporophyte | gametes e. microsporangium | antheridium | sperm 2. A feature common to all green plants except green algae and bryophytes is a. xylem tracheids b. pollen c. chlorophyll b d. embryo nurtured by parent plant e. seeds 3. What is one way that the sporophyte of a moss, hornwort or liverwort differs from the sporophytes of vascular plants? a. it produces spores by meiosis b. it is unicellular c. it is multicellular d. it is dikaryotic e. it is unbranched and bears a single sporangium 4. An archegonium is a structure that a. produces an egg b. contains cells that later undergo meiosis c. is found on both gametophytes and sporophytes d. produces sperm e. produces spores 5. Which of the following stages of a plant life cycle is a single haploid cell? a. spore b. seed c. zygote d. pollen e. gametophyte 6. Which group of green plants contains some of the tallest, oldest and most massive individual organisms on earth? a. conifers b. bryophytes c. angiosperms d. fungi e. ferns 7. If a microsporangium from a male pine cone currently contains 100 microspores, how many pollen grains will eventually leave the microsporangium? a. 50 b. 400 c. 25 d. 100 e. 200 8. If a pollen grain arrives in Spring 2012 at the micropyle of a female pine ovule, when will the seed resulting from the fertilization of an egg in that particular ovule by the sperm from that particular pollen grain be dispersed? a. Spring 2013 b. Fall 2013 c. Spring 2014 d. Fall 2014 e. Spring 2015 9. The species Ginkgo biloba and one other group of gymnosperms known as provide a possible original function for pollen tubes that differs from their role in most seed plants, which is to carry sperm directly to the egg. In these two groups of gymnosperms, the sperm are and the pollen tube is a. cycads | haustorial | agellated b. conifers | multicellular | necrotic c. gnetophytes | endosperm | projectile d. lycophytes | agellated | haustorial e. cycads | agellated | haustorial