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Quiz 10

Subject: BiologyTopic: Quiz 10Paper details:Your Plant Password (all lower case)Your Last NameYour First NameEnter your email address accuratelyQuestions 1 – 14 are taken from Chapter 19 in the textbook.Questions 15 – 20 are taken from the course website, Vascular Plants: Angiosperms.A B C D1. The flowering plants have dominated the land for over ________________ million years.A. 360B. 280C. 100D. 45A B C D2. Angiosperms are ______________________.A. monophyletic, meaning they are derived from a single common ancestorB. polyphyletic, meaning they are derived from several distinct ancestral linesC. biphyletic, meaning they are derived from two different ancestral linesD. impossible to determine any ancestral lines whatsoeverA B C D3. The flower is a ______________________.A. modified leafB. determinate shootC. gametophyteD. all the above are correctA B C D4. The stamens, collectively called the androecium, are ______________________.A. sterileB. modified branchesC.megasporophyllsD. microsporophyllsA B C D5. The carpels, collectively called the gynoecium, are ______________________.A.megasporophyllsB. sterile petalsC. modified branchesD. microsporophyllsA B C D6. The placenta is the ______________________.A. embryonic shoot tip inside the ovuleB. place where the petals and sepals are attached to the receptacleC. open chamber inside the ovaryD. portion of the ovary where the ovules are attachedA B C D7. Flowers are said to be imperfect if they ______________________.A. are wind pollinatedB. lack petalsC. lack either stamens or carpelsD. are bisexualA B C D8. Flower symmetry has ________________ main forms. A. twoB. threeC. fourD. fiveA B C D9. The exine layer of pollen grains is composed of ______________________.A. cutinB. sporopolleninC. ligninD. suberinA B C D10. Pollen grains are ___________________ in the fossil record.A. absentB. seldom, but occasionally, foundC. too delicate to be preservedD. widely representedA B C D11. The funiculus and the micropyle are found on ______________________.A. ovulesB. pollen grainsC. anthersD. stigmasA B C D12. Compared with those of gymnosperms, the pollen tubes of most angiosperms ______________________.A. are much shorterB. must be many times smaller in diameterC. grow fasterD. carry flagellated spermsA B C D13. Double fertilization ______________________.A. refers to the union of one sperm with the egg and the other sperm with the polar nucleiB.is a defining characteristic of angiospermsC. leads to the formation of embryo and endospermD. all of the above are correctA B C D14. The angiosperms are classified in___________________________.A. two phyla, “seedless vascular plants” and “seed-producing vascular plants”B. the same phylum as conifersC. three classes, the eudicotyledophyta, the monocotyledophyta, and the angiophytaD. a single phylum, the anthophytaA B C D15. The “angio” in angiosperm refers to the fact that _______________________.A. ovules are covered by an ovaryB. anthers produce pollen grainsC. the flower is bisexualD. fertilization takes place without free waterA B C D16. “Diagnostic characteristics” (characteristics which are unique to the group) of the angiosperms include ________.A. vascular tissueB. seedsC. “double fertilization”D. secondary growthA B C D17. Flowering plants appeared ___________________________.A. in the Devonian, just after the gymnosperms became extinct, about 10 million years agoB. at the beginning of the Cambrian Period, along with the ferns and gymnosperms, about 600 million years agoC. near the end of the Carboniferous Period, about the time dinosaurs became extinct, about 400 million years agoD. at the start of the Cretaceous Period, about 145 million years agoA B C D18. Approximately ___________________ of flowering plants are insect pollinated.A. 75 percentB. 65 percentC. 55 percentD. 45 percentA B C D19. Morphologically, a flower is a modified _______________.A. cellB. sporeC. branchD. leafA B C D20. If a flower has all parts present (sepals, petals, stamens and pistil), it is said to be ___________________.A. completeB. heterosporousC. sexualD. imperfect