Biology
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Questions 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 D
1. The flowering plants have dominated the land for over ________________ million years.
A. 360
B. 280
C. 100
D. 45
A B C D
2. Angiosperms are ______________________.
A. monophyletic, meaning they are derived from a single common ancestor
B. polyphyletic, meaning they are derived from several distinct ancestral lines
C. biphyletic, meaning they are derived from two different ancestral lines
D. impossible to determine any ancestral lines whatsoever
A B C D
3. The flower is a ______________________.
A. modified leaf
B. determinate shoot
C. gametophyte
D. all the above are correct
A B C D
4. The stamens, collectively called the androecium, are ______________________.
A. sterile
B. modified branches
C.megasporophylls
D. microsporophylls
A B C D
5. The carpels, collectively called the gynoecium, are ______________________.
A.megasporophylls
B. sterile petals
C. modified branches
D. microsporophylls
A B C D
6. The placenta is the ______________________.
A. embryonic shoot tip inside the ovule
B. place where the petals and sepals are attached to the receptacle
C. open chamber inside the ovary
D. portion of the ovary where the ovules are attached
A B C D
7. Flowers are said to be imperfect if they ______________________.
A. are wind pollinated
B. lack petals
C. lack either stamens or carpels
D. are bisexual
A B C D
8. Flower symmetry has ________________ main forms. A. two
B. three
C. four
D. five
A B C D
9. The exine layer of pollen grains is composed of ______________________.
A. cutin
B. sporopollenin
C. lignin
D. suberin
A B C D
10. Pollen grains are ___________________ in the fossil record.
A. absent
B. seldom, but occasionally, found
C. too delicate to be preserved
D. widely represented
A B C D
11. The funiculus and the micropyle are found on ______________________.
A. ovules
B. pollen grains
C. anthers
D. stigmas
A B C D
12. Compared with those of gymnosperms, the pollen tubes of most angiosperms ______________________.
A. are much shorter
B. must be many times smaller in diameter
C. grow faster
D. carry flagellated sperms
A B C D
13. Double fertilization ______________________.
A. refers to the union of one sperm with the egg and the other sperm with the polar nuclei
B.is a defining characteristic of angiosperms
C. leads to the formation of embryo and endosperm
D. all of the above are correct
A B C D
14. The angiosperms are classified in___________________________.
A. two phyla, “seedless vascular plants” and “seed-producing vascular plants”
B. the same phylum as conifers
C. three classes, the eudicotyledophyta, the monocotyledophyta, and the angiophyta
D. a single phylum, the anthophyta
A B C D
15. The “angio” in angiosperm refers to the fact that _______________________.
A. ovules are covered by an ovary
B. anthers produce pollen grains
C. the flower is bisexual
D. fertilization takes place without free water
A B C D
16. “Diagnostic characteristics” (characteristics which are unique to the group) of the angiosperms include ________.
A. vascular tissue
B. seeds
C. “double fertilization”
D. secondary growth
A B C D
17. Flowering plants appeared ___________________________.
A. in the Devonian, just after the gymnosperms became extinct, about 10 million years ago
B. at the beginning of the Cambrian Period, along with the ferns and gymnosperms, about 600 million years ago
C. near the end of the Carboniferous Period, about the time dinosaurs became extinct, about 400 million years ago
D. at the start of the Cretaceous Period, about 145 million years ago
A B C D
18. Approximately ___________________ of flowering plants are insect pollinated.
A. 75 percent
B. 65 percent
C. 55 percent
D. 45 percent
A B C D
19. Morphologically, a flower is a modified _______________.
A. cell
B. spore
C. branch
D. leaf
A B C D
20. If a flower has all parts present (sepals, petals, stamens and pistil), it is said to be ___________________.
A. complete
B. heterosporous
C. sexual
D. imperfect