E: It is imperfect（不完整的）. 正确答案是C

4. In a flower with perianth（花被）and stamens attached above the ovary, the perianth and stamens are said to be: A: hypogynous（〈花瓣,萼片,雄蕊等〉下位的）. B: epigynous（上位的）. C: perigynous （周位的） D: superior（.上级的,好的） E: Inferior（下级的,次的）. 正确答案是B

5. The inner wall of the pollen grain（花粉粒）is the: A: integument（覆盖物） B: nucellar wall

C: exine（花粉粒外壁，孢子外壁） D: intine（内壁）

E: tapetum.（反光色素层)） 正确答案是D

6. Unlike spores（孢子）of most seedless plants, pollen grains: A: have only one nucleus when shed（脱落）.

B: germinate（发芽） through a Y-shaped opening. C: are products of meiosis（减数分裂）.

D: undergo（经历） mitosis in the sac in which they are produced. E: divide immediately by meiosis. 正确答案是D

7. Which of the following statements about embryo sac（胚囊） development in Lilium（百合属植物） is FALSE?

Development involves two four-nucleate stages.A:All four megaspore（大孢子,〈种子植物的〉胚囊） nuclei participate.

Development involves two four-nucleate stages.B:There is no wall formation（形成） during megasporogenesis（大孢子发生）.

Development involves two four-nucleate stages.C:At the micropylar end

Development involves（包括）two four-nucleate stages.D: three haploid（单倍体） nuclei are formed.

Development involves two four-nucleate stages.E:At the chalazal（系带）end 正确答案是 two triploid nuclei are formed.

8. Which of the following processes is NOT initiated（开始） by double fertilization（授精）? A: endosperm（胚乳） formation B: embryo（胚芽） formation C: seed coat formation D: fruit formation

E: embryo sac formation 正确答案是E

9. When the stamens mature before the stigmas（柱头） of the same flower become receptive（能接纳的）, a plant is said to be:

A: protandrous（雄蕊先熟的）. B: protogynous.

C: monoecious（雄雌同株的） D: dioecious）（雌雄异体的）

E: monogamous（单配的, 一雌一雄的） 正确答案是A

10. A unique（独特的）characteristic of angiosperms（被子植物） is: A: single-pored pollen grains. B: single-pored spores.

C: a dominant（显性的） sporophyte （孢子体, 孢子形成体） D: vascular tissue. E: closed carpels. 正确答案是E

11. Which of the following statements about stamens is FALSE?

A: In some woody magnoliids they are broad, colored, and scented（有香味的）. B: In some archaic（古老的） angiosperms（被子植物） they are fleshy. C: In most angiosperms they have been modified into nectaries（蜜腺, 蜜管）. D: In some specialized flowers they are fused （保护）with the corolla（花冠）. E: In certain plant families they have become sterile（不育的）. 正确答案是C

12. Large, dull-colored flowers with strong odors（气味）and inferior（下的） ovaries（子房） are most likely pollinated（对...授粉） by: A: bees. B: birds. C: beetles D: butterflies.

E: flies and mosquitoes（蚊子）. 正确答案是C

13. Which of the following statements about wind-pollinated flowers is FALSE? A:They have well-exposed（暴露的） stamens. B:They have well-exposed stigmas.

C:They evolved directly from gymnosperms（裸子植物）. D:They have ovaries with single ovules（胚珠）. E:They do not produce nectar.（花蜜） 正确答案是C

14. Which of the following are colorless but can contribute to the ivory or white colors of flowers? A:anthocyanins（花青素） B:flavonols（黄酮醇） C:cyanidins

D:carotenoids（类胡罗卜素） E:betacyanins（花青苷） 正确答案是B

15. A pineapple（菠萝）is an example of a(n): A:drupe（核果）

B:fruitlet.（小果实） C:simple fruit

D:multiple fruit （复合果） E:aggregate fruit. （聚合果） 正确答案是D

16. A dehiscent（裂开性的）fruit derived from a single carpel that splits（裂开）along two sides is a:

A:capsule.（蒴果） B:legume （荚果） C:samara.（翼果）

D: cypsela（连萼瘦果）. E: schizocarp.（分裂果） 正确答案是B

17. Which of the following is NOT an adaptation specific to fruits or seeds dispersed by animals? A: sweet taste

B:brightly colored flesh C:wings

D:hooks（钩） and barbs （倒钩） E:elaiosomes 正确答案是C

Flowers, fruits and seeds Part B

1. The collective term for the male structure of a flower is the ___. A:calyx（花萼） B:corolla（花冠） C:anther （花粉囊） D:stamen 正确答案是D

2. Pollination ___ in flowering plants. A: preceeds fertilization B:follows fertilization

C:may preceed or follow fertilization D:occurs at the same time as fertilization 正确答案是A

3. The collective term for sepals（萼片） is the ___. A:petal （花瓣） B:corolla （花冠） C:calyx （花萼） D:receptacle （花托） 正确答案是C

4. Pollen is produced in chambers located within the ___. A:anther（花粉囊） B:filament （花丝） C:style D:ovary

正确答案是A

5. A pistil（雌蕊） consists of units called ___. A:ovules （.胚珠） B:pollen

C:gynoecia（雌蕊群,雌蕊） D:carpels 正确答案是D

6. Double fertilization occurs when ___.

A:sperm and egg fuse（融合） to form two zygotes（受精卵）

B:one sperm fuses with an egg and another sperm fuses with the polar nuclei C:two sperm fuse with the polar nuclei

D:one sperm fuses with an egg and another sperm fuses with the synergid（助细胞） cells 正确答案是B

7. A monocot is not identified （识别, 鉴别）by ___.

A:flower parts arranged in 3's or multiples（倍数,成倍的） of 3 B:parallel（平行的） leaf venation

C:vascular bundles of the stem arranged in a concentric（同中心的） ring D:absence of secondary growth 正确答案是C

8. Plants that have staminate（有雄性花蕊的）and pistillate（有雌蕊的, 只有雌蕊的）flowers on the same individual are called ___. A:dioecious（雌雄异体的） B: deciduous（每年落叶的） C:monoecious（雄雌同株的） D:perfect

正确答案是C

9. The inflorescence（花, 花序）of a plant with flowers indirectly attached by very short pedicels（花梗） or directly attached to the main flowering stalk （茎, 柄, 梗, 秆）is classified as ___. A:corymb（伞状花序） B:spike （穗状花序） C:raceme （总状花序） D:panicle （圆锥花序） 正确答案是B

10. Sunflowers, such as Helianthus spp（向日葵属的植物）., have an inflorescence type called a ___. A:spike B:raceme C:corymb

D:head （头状花序） 正确答案是D

11. The most common pollination vector(s) is (are) the ___. A:insects B:birds

C:mammals（哺乳动物）