front 1 1) Which group is noted for the independence of gametophyte and sporophyte generations from each other? A) ferns B) mosses, hornworts, and liverworts C) charophytes D) angiosperms E) gymnosperms | back 1 A |
front 2 2) All of the following cellular structures are functionally important in cells of the gametophytes of both angiosperms and gymnosperms except A) haploid nuclei. B) mitochondria. C) cell walls. D) chloroplasts. E) peroxisomes. | back 2 D |
front 3 3) The seed coat's most important function is to provide A) a nonstressful environment for the megasporangium. B) the means for dispersal. C) dormancy. D) a nutrient supply for the embryo. E) desiccation resistance. | back 3 E |
front 4 4) In addition to seeds, which of the following characteristics are unique to the seed-producing plants? A) sporopollenin B) lignin present in cell walls C) pollen D) use of air currents as a dispersal agent E) megaphylls | back 4 C |
front 5 5) Suppose that the cells of seed plants, like the skin cells of humans, produce a pigment upon increased exposure to UV radiation. Rank the following cells, from greatest to least, in terms of the likelihood of producing this pigment.
| back 5 C |
front 6 6) Arrange the following in the correct sequence, from earliest to most recent, in which these plant traits originated.
| back 6 E |
front 7 7) In seed plants, which of the following is part of a pollen grain and has a function most like that of the seed coat? A) sporophyll B) male gametophyte C) sporopollenin D) stigma E) sporangium | back 7 C |
front 8 8) In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a A) moss sporophyte. B) moss gametophyte bearing both male and female gametangia. C) fern sporophyte. D) hermaphroditic fern gametophyte. E) fern gametophyte bearing only antheridia. | back 8 E |
front 9 9) Which of the following is most important in making the typical seed more resistant to adverse conditions than the typical spore? A) a different type of sporopollenin B) an internal reservoir of liquid water C) integument(s) D) ability to be dispersed E) waxy cuticle | back 9 C |
front 10 10) A researcher has developed two stains for use with seed plants. One stains sporophyte tissue blue; the other stains gametophyte tissue red. If the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? A) The pollen grains will be pure red. B) The pollen grains will be pure blue. C) The pollen grains will have red interiors and blue exteriors. D) The pollen grains will have blue interiors and red exteriors. E) Insofar as the pollen grains are independent of the plant that produced them, they will not absorb either stain. | back 10 C |
front 11 11) Gymnosperms differ from both extinct and extant (living) ferns because they A) are woody. B) have macrophylls. C) have pollen. D) have sporophylls. E) have spores. | back 11 C |
front 12 12) Generally, wind pollination is most likely to be found in seed plants that grow A) close to the ground. B) in dense, single-species stands. C) in relative isolation from other members of the same species. D) along coastlines where prevailing winds blow from the land out to sea. E) in well-drained soils. | back 12 B |
front 13 13) Which of the following statements correctly describes a portion of the pine life cycle? A) Female gametophytes use mitosis to produce eggs. B) Seeds are produced in pollen-producing cones. C) Pollen grains contain female gametophytes. D) A pollen tube slowly digests its way through the triploid endosperm. | back 13 A |
front 14 14) Which of the following statements is true of the pine life cycle? A) Cones are homologous to the capsules of moss plants. B) The pine tree is a gametophyte. C) Male and female gametophytes are in close proximity during gamete synthesis. D) Conifer pollen grains contain male gametophytes. E) Double fertilization is a relatively common phenomenon. | back 14 D |
front 15 15) Within a gymnosperm megasporangium, what is the correct sequence in which the following should appear during development, assuming that fertilization occurs?
| back 15 B |
front 16 16) Which of the following can be found in gymnosperms? A) nonfertile flower parts B) triploid endosperm C) fruits D) pollen E) carpels | back 16 D |
front 17 17) Arrange the following structures, which can be found on male pine trees, from the largest structure to the smallest structure (or from most inclusive to least inclusive).
| back 17 A |
front 18 18) Which trait(s) is (are) shared by many modern gymnosperms and angiosperms?
| back 18 C |
front 19 19) Which structure is common to both gymnosperms and angiosperms? A) stigma B) carpel C) ovule D) ovary E) anthers | back 19 C |
front 20 20) A botanist discovers a new species of land plant with a dominant sporophyte, chlorophylls a and b, and cell walls made of cellulose. In assigning this plant to a phylum, which of the following, if present, would be least useful? A) endosperm B) seeds C) sperm that lack flagella D) flowers E) spores | back 20 E |
front 21 21) What is true of stamens, sepals, petals, carpels, and pinecone scales? A) They are female reproductive parts. B) None are capable of photosynthesis. C) They are modified leaves. D) They are found on flowers. E) They are found on angiosperms. | back 21 C |
front 22 22) Reptilian embryos are protected from desiccation by a leathery shell. Similarly, which pair of structures protects seed plants' embryos and male gametophytes, respectively, from desiccation?
| back 22 E |
front 23 23) Which of the following sex and generation combinations most directly produces the integument of a pine seed? A) male gametophyte B) female gametophyte C) male sporophyte D) female sporophyte | back 23 D |
front 24 24) Which of the following sex and generation combinations most directly produces the pollen tube? A) male gametophyte B) female gametophyte C) male sporophyte D) female sporophyte | back 24 A |
front 25 25) Which of the following sex and generation combinations most directly produces the megasporangium of pine ovules? A) male gametophyte B) female gametophyte C) male sporophyte D) female sporophyte | back 25 D |
front 26 26) Which of the following sex and generation combinations most directly produces the fruit? A) male gametophyte B) female gametophyte C) male sporophyte D) female sporophyte | back 26 D |
front 27 27) Given the differences between angiosperms and gymnosperms in the development of the integument(s), which of these statements is the most logical consequence? A) The seed coats of angiosperms should be relatively thicker than those of gymnosperms. B) It should be much more difficult for pollen tubes to enter angiosperm ovules than for them to enter gymnosperm ovules. C) The female gametophytes of angiosperms should not be as well protected from environmental stress as should those of gymnosperms. D) As a direct consequence of such differences, angiosperms should have fruit. E) Angiosperm seeds should be more susceptible to desiccation. | back 27 A |
front 28 28) Which of the following is a characteristic of all angiosperms? A) complete reliance on wind as the pollinating agent B) double internal fertilization C) free-living gametophytes D) carpels that contain microsporangia E) ovules that are not contained within ovaries | back 28 B |
front 29 29) Which of the following is true concerning flowering plants? A) The flower includes sporophyte tissue. B) The gametophyte generation is dominant. C) The gametophyte generation is what we see when looking at a large plant. D) The sporophyte generation is not photosynthetic. E) The sporophyte generation consists of relatively few cells within the flower. | back 29 A |
front 30 30) What adaptations should one expect of the seed coats of angiosperm species whose seeds are dispersed by frugivorous (fruit-eating) animals, as opposed to angiosperm species whose seeds are dispersed by other means?
| back 30 D |
front 31 31) The seeds of orchids are among the smallest known, with virtually no endosperm and with miniscule seed leaves. Consequently, what should one expect to be true of such seeds? A) They require extensive periods of dormancy during which the embryo develops. B) They are surrounded by brightly colored, sweet fruit. C) They germinate very soon after being released from the ovary. D) The developing embryo within is dependent upon the gametophyte for nutrition. E) The sporophytes that produce such seeds are wind-pollinated. | back 31 C |
front 32 32) Which of the following are structures of angiosperm gametophytes? A) immature ovules B) pollen tubes C) ovaries D) stamens E) sepals | back 32 B |
front 33 33) Which of the following statements is true of monocots? A) They are currently thought to be polyphyletic. B) The veins of their leaves form a netlike pattern. C) They, along with the eudicots, magnoliids, and basal angiosperms, are currently placed in the phylum Anthophyta. D) Each possesses multiple cotyledons. E) They are in the clade that includes most of our crops, except the cereal grains. | back 33 C |
front 34 34) Carpels and stamens are A) sporophyte plants in their own right. B) gametophyte plants in their own right. C) gametes. D) spores. E) modified sporophylls. | back 34 E |
front 35 35) Which of the following is a true statement about angiosperm carpels? A) Carpels are features of the gametophyte generation. B) Carpels consist of anther and stamen. C) Carpels are structures that directly produce male gametes. D) Carpels surround and nourish the female gametophyte. E) Carpels consist of highly modified microsporangia. | back 35 D |
front 36 36) The generative cell of male angiosperm gametophytes is haploid. This cell divides to produce two haploid sperm cells. What type of cell division does the generative cell undergo to produce these sperm cells? A) binary fission B) mitosis C) meiosis D) mitosis without subsequent cytokinesis E) meiosis without subsequent cytokinesis | back 36 B |
front 37 37) Angiosperm double fertilization is so-called because it features the formation of A) two embryos from one egg and two sperm cells. B) one embryo from one egg fertilized by two sperm cells. C) two embryos from two sperm cells and two eggs. D) one embryo involving one sperm cell and an endosperm involving a second sperm cell. E) one embryo from two eggs fertilized by a single sperm cell. | back 37 D |
front 38 38) Among plants known as legumes (beans, peas, alfalfa, clover, etc.) the seeds are contained in a fruit that is itself called a legume, better known as a pod. Upon opening such pods, it is commonly observed that some ovules have become mature seeds, whereas other ovules have not. Thus, which of the following statements is (are) true?
| back 38 D |
front 39 39) How have fruits contributed to the success of angiosperms? A) by nourishing the plants that make them B) by facilitating dispersal of seeds C) by attracting insects to the pollen inside D) by producing sperm and eggs inside a protective coat E) by producing triploid cells via double fertilization | back 39 B |
front 40 40) Arrange the following structures from largest to smallest, assuming that they belong to two generations of the same angiosperm.
| back 40 E |
front 41 41) Which structure(s) must pass through the micropyle for successful fertilization to occur in angiosperms? A) only one sperm nucleus B) two sperm nuclei C) the pollen tube D) Two of the responses above are correct. | back 41 D |
front 42 42) Hypothetically, one of the major benefits of double fertilization in angiosperms is to A) decrease the potential for mutation by insulating the embryo with other cells. B) increase the number of fertilization events and offspring produced. C) promote diversity in flower shape and color. D) coordinate developmental timing between the embryo and its food stores. E) emphasize embryonic survival by increasing embryo size. | back 42 D |
front 43 43) Which of the following flower parts develops into a seed? A) ovule B) ovary C) fruit D) stamen | back 43 A |
front 44 44) Which of the following flower parts develops into the pulp of a fleshy fruit? A) stigma B) style C) ovule D) ovary E) micropyle | back 44 D |
front 45 45) Angiosperms are the most successful terrestrial plants. Which of the following features is unique to them and helps account for their success? A) wind pollination B) dominant gametophytes C) fruits enclosing seeds D) embryos enclosed within seed coats E) sperm cells without flagella | back 45 C |
front 46 46) In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg?
| back 46 A |
front 47 47) Many mammals have skins and mucous membranes that are sensitive to phenolic secretions of plants like poison oak (Rhus). These secondary compounds are primarily adaptations that A) prevent desiccation. B) favor pollination. C) foster seed dispersal. D) decrease competition. E) inhibit herbivory. | back 47 E |
front 48 48) The fruit of the mistletoe, a parasitic angiosperm, is a one-seeded berry. In members of the genus Viscum, the outside of the seed is viscous (sticky), which permits the seed to adhere to surfaces, such as the branches of host plants or the beaks of birds. What should be expected of the fruit if the viscosity of Viscum seeds is primarily an adaptation for dispersal rather than an adaptation for infecting host plant tissues? A) It should be drab in color. B) It should be colored so as to provide it with camouflage. C) It should be nutritious. D) It should secrete enzymes that can digest bark. E) It should contain chemicals that cause birds to fly to the ground and vomit. | back 48 C |
front 49 49) Cutting down rain forests can lead to A) decreased temperatures. B) decreased rainfall. C) decreased atmospheric carbon dioxide. D) increased biodiversity. E) more than one of these. | back 49 B |
front 50 50) The cutting and burning of tropical rain forests leads to which of the following?
| back 50 D |
front 51 51) Over human history, which process has been most important in improving the features of plants that have long been used by humans as staple foods? A) genetic engineering B) artificial selection C) natural selection D) sexual selection E) pesticide and herbicide application | back 51 B |
front 52 52) What is the greatest threat to plant diversity? A) insects B) grazing and browsing by animals C) pathogenic fungi D) competition with other plants E) human population growth | back 52 E |
front 53 53) A botanist was visiting a tropical region for the purpose of discovering plants with medicinal properties. All of the following might be ways of identifying potentially useful plants except A) observing which plants sick animals seek out. B) observing which plants are the most used food plants. C) observing which plants animals do not eat. D) collecting plants and subjecting them to chemical analysis. E) asking local people which plants they use as medicine. | back 53 B |
front 54 98) Where in an angiosperm would you find a megasporangium? A) in the style of a flower B) inside the tip of a pollen tube C) enclosed in the stigma of a flower D) within an ovule contained within an ovary of a flower E) packed into pollen sacs within the anthers found on a stamen | back 54 D |
front 55 99) A fruit is most commonly A) a mature ovary. B) a thickened style. C) an enlarged ovule. D) a modified root. E) a mature female gametophyte. | back 55 A |
front 56 100) With respect to angiosperms, which of the following is incorrectly paired with its chromosome count? A) egg–n B) megaspore–2n C) microspore–n D) zygote–2n E) sperm–n | back 56 B |
front 57 101) Which of the following is not a characteristic that distinguishes gymnosperms and angiosperms from other plants? A) alternation of generations B) ovules C) integuments D) pollen E) dependent gametophytes | back 57 A |
front 58 102) Gymnosperms and angiosperms have the following in common except A) seeds. B) pollen. C) vascular tissue. D) ovaries. E) ovules. | back 58 D |