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CHOICE. Exam Name___________________________________ MULTIPLE Choose the one alternative that best completes the statement or answers the question. 1) The tallest plant on Earth is A) a 379-foot redwood tree in California. B) a 740-foot white oak tree in Illinois. C) a 500-foot kelp living off the coast of California. D) a giant seed fern in southern Peru. 1) 2) What event that occurred around 10,000 years ago led to genetic changes in many of the plants we are most familiar with? A) the invention of genetic engineering B) the domestication of animals C) the beginning of agriculture D) the mass extinction of herbivores 2) 3) Most angiosperms are dicots and most dicots are A) gymnosperms. B) mosses. C) cycads. D) eudicots. 3) 4) Monocot floral parts usually occur in multiples of A) five. B) two. C) four. D) three. 4) 5) Which of the following is a characteristic of eudicots? A) parallel leaf venation B) vascular bundles scattered throughout the stem C) a taproot system D) a flower with six petals 5) 6) Which of the following statements is false? A) Stems and leaves depend on the water and minerals absorbed by the roots. B) The shoot system of a plant consists of the stems, leaves, and adaptations for reproduction. C) Plant root hairs help to absorb carbon dioxide from the soil. D) Roots depend upon sugars produced in photosynthetic organs such as leaves. 6) 7) What is the node of a plant stem? A) the point of apical dominance C) a small pore where gases are exchanged 7) B) the point of leaf attachment D) the area between the shoots and the roots 8) Removing the terminal bud of a plant that shows apical dominance will cause A) increased growth of the terminal bud. B) an increase in the growth of the root system. C) increased growth of the axillary buds. D) an immediate flowering of the plant. 8) 9) The chief function of root hairs is to A) decrease the anchoring power of roots. B) provide a direct passageway from the soil to the vascular cylinder. C) increase the surface area for absorption of water and minerals. D) provide a home for symbiotic bacteria. 9) 1 10) A plant stem modified for storage of food such as starch is called a A) runner. B) bulb. C) tuber. D) taproot. 10) 11) Which of the following statements is false? A) White potatoes are modified plant roots. B) A carrot is an example of a taproot. C) The layers of an onion are actually modified leaves. D) Stalks of celery are the petioles of the plant. 11) 12) Which of the following plant cells or tissues help regulate the movement of carbon dioxide into and out of a leaf? A) guard cells B) xylem C) root hairs D) sieve tubes 12) 13) The cells that store starch in dicot roots are located between the A) xylem and the phloem. B) epidermis and the vascular cylinder. C) epidermis and the root hairs. D) epidermis and the cortex. 13) 14) In general, plant dermal tissues are found A) at the outer surface of a plant. B) near the center of the plant stems and roots. C) throughout the plant body. D) lining the vascular tissue. 14) 15) Which of the following statements is false? A) The pith of a stem is often important in food storage. B) Tissues that are neither dermal nor vascular are known as the ground tissue system. C) The ground tissue system of a leaf is called the mesophyll. D) Each vein in a leaf is composed of either xylem or phloem, but not both. 15) 16) Which of the following structures is found in both plant and animal cells? A) mitochondria B) chloroplasts C) a large central vacuole containing fluid D) cell wall surrounding the plasma membrane 16) 17) Sieve- tube elements are plant cells that are part of a plant tissue called A) phloem. B) tracheids. C) xylem. D) sclereids. 17) 18) Which type of vascular tissue cell in a plant is dead at maturity? A) sieve-tube cells B) companion cells C) vessel elements D) parenchyma cells 18) 19) Which of the following substances, by providing strength, allows sclerenchyma cells to provide support and play a role analogous to that of an animal's skeleton? A) chlorophyll B) starch C) sucrose D) lignin 19) 20) Photosynthesis occurs in which type of plant tissue? A) epidermal tissue C) vascular cambium 20) 2 B) parenchyma D) collenchyma 21) Which of the following is a function of tracheids? A) production of sex cells C) food storage B) water conduction D) photosynthesis 21) 22) Which of the following cells provide flexible support to the growing parts of plants? A) parenchyma cells B) sieve-tube elements C) sclerenchyma cells D) collenchyma cells 22) 23) New growth that increases stem length on a plant arises mainly from A) apical meristems. B) the tips of leaves. C) the base of the stem. D) the vascular cambium. 23) 24) The growth that pushes a root down through the soil takes place through A) cell elongation behind the root tip. B) cell elongation at the tip of the root cap. C) differentiation of xylem cells in the apical meristem. D) cell division in the apical meristem. 24) 25) If you carve your initials in the trunk of a tree, will they move up as the tree grows? A) Yes, because secondary growth will cause them to move up. B) Yes, because growth continues in all parts of a plant throughout its life. C) No, because elongation occurs just below the tips of growing stems in the apical meristems. D) Yes, because a tree elongates from the ground up. 25) 26) The three tissue systems of a mature plant root complete their development in the root zone of A) cell division. B) differentiation. C) elongation. D) vascularization. 26) 27) Most trees and shrubs continue to grow year after year. Such plants are known as A) superannuals. B) biennials. C) perennials. D) annuals. 27) 28) The increase in girth associated with production of wood and bark in trees occurs as a consequence of A) growth in apical meristems. B) indeterminate growth. C) secondary growth. D) primary growth. 28) 29) Bark consists of A) cork only. B) secondary phloem, cork cambium, and cork. C) cork cambium and cork. D) functioning xylem, secondary phloem, cork cambium, and cork. 29) 30) A vascular cambium cell divides to produce an inner and an outer daughter cell. Which of the following represents the probable fate of these cells? A) Both cells continue to divide to produce wood. B) The inner cell will differentiate into xylem, and the outer cell will divide again. C) Both cells will continue to divide without differentiating into specialized cells. D) The inner cell will differentiate into phloem, and the outer cell will differentiate into xylem. 30) 3 31) A woody plant lives through five years of drought, followed by five years of good growing conditions. The ring of xylem cells formed during the five good years will A) conduct a higher ratio of sugar to water than those formed during the drought years. B) be living, whereas those formed during the drought years will be dead. C) be thicker than those formed during the drought years. D) be thinner than those formed during the drought years. 31) 32) How many layers of vascular cambium will there be in the trunk of a ten- year-old tree? A) thousands B) one C) ten D) two 32) 33) What is the difference between the heartwood and sapwood of a tree? A) Sapwood contains xylem and heartwood contains phloem. B) Heartwood contains xylem and sapwood contains phloem. C) Heartwood no longer transports water and minerals, while sapwood still conducts xylem sap. D) Heartwood contains old phloem that no longer functions, and sapwood contains functioning phloem. 33) 34) The male organ of a flower is the A) style. B) sepal. 34) C) carpel. D) stamen. 35) In a showy flower such as a magnolia or rose, the flower parts that play the main role in attracting the notice of animal pollinators the A) are sepals. B) fruits. C) stigmas. D) petals. 35) 36) Before it opens up into full blossom, the outer green layer of a rosebud consists of the leaflike A) ovary. B) petals. C) stamen. D) sepals. 36) 37) Flowers bear seeds that develop from ovules housed in protective chambers called A) stamens. B) antheridia. C) sepals. D) ovaries. 37) 38) How many chromosomes are there in a maize egg cell nucleus as compared to a maize pollen cell nucleus? A) twice as many B) half as many C) the same number D) half as many or the same number, depending on whether the pollen cell has divided to produce sperm or not 38) 39) In a flowering plant, the cells that give rise to sperm undergo meiosis in the A) stigma. B) sepals. C) ovaries. D) anthers. 39) 40) Which of the following flower parts produces female gametophytes? A) stigmas B) ovules C) anthers D) sepals 41) How does the sperm of an angiosperm reach the egg? A) via the pollen tube that grows from the ovule to reach the pollen grain on the stigma B) by actively swimming down through the style to the egg C) usually via an insect, which places sperm in the ovary while probing for nectar D) via the pollen tube that grows from the pollen grain through the carpel tissues to the ovule 4 40) 41) 42) In angiosperms, the process of ________ ensures that the endosperm will develop only in ovules containing a fertilized egg. A) cytogenesis B) meiosis C) cytokinesis D) double fertilization 42) 43) A seed develops from a(n) A) pollen grain. 43) B) ovule. C) fruit. D) ovary. 44) The "halves" of an individual peanut, which represent its cotyledons, develop from the fertilized zygote and are composed of A) triploid endosperm cells. B) diploid maternal sporophyte cells. C) haploid endosperm cells. D) diploid embryo sporophyte cells. 44) 45) How many chromosomes are there in a maize embryo cell nucleus as compared to a maize endosperm cell nucleus? A) half as many B) twice as many C) the same number D) two- thirds as many 45) 46) While cleaning out the attic, you find a packet of seeds that your grandmother gathered from her garden. You plant them outside, and some of them sprout. What was the condition of these germinating seeds while they were in the attic? A) They were alive and very metabolically active. B) The endosperm cells were dead; the embryo cells were alive but inactive. C) They were dead, but the embryo cells revived in response to water. D) They were alive but dormant. 46) 47) Which of the following is a function of fruits? A) seed dispersal B) attracting pollinators C) production of food for the developing embryo D) pollen dispersal 47) 48) A mature ovary, specialized as a vessel that houses and protects seeds, is a A) ovule. B) cotyledon. C) fruit. D) seed coat. 48) 49) Which of the following structures is the first to emerge from the germinating seed of a eudicot such as the garden bean? A) the shoot sheath B) the embryonic root C) the embryonic shoot hook D) cotyledons 49) 50) Which of the following statements about germination is false? A) Germination usually takes place after a period of dormancy. B) A hydrated seed expands, rupturing its seed coat. C) The germination of a seed represents the beginning of life. D) Germination usually begins when a seed takes up water. 50) 5 51) What happens to the cotyledons of pea and maize seeds? A) They form a protective sheath around the developing root system. B) They surround the base of the shoot to provide additional strength. C) They remain in the soil and decompose. D) They immediately begin to use the sun's energy in photosynthesis. 51) 52) Which of the following plant parts commonly contributes to asexual reproduction? A) flowers B) seeds C) fruits D) roots 52) 53) The genetically identical organisms that result from asexual reproduction are called A) seeds. B) seedlings. C) clones. D) rootlets. 53) 54) Which of the following is an advantage of cloning horticultural crops over sexual propagation? A) Cloned plants grow more slowly, but have stronger stems. B) Cloning provides more variation in flower color and size. C) Cloning plants can allow growers to produce large numbers of plants with minimal effort and expense. D) Cloned plants are healthier and less susceptible to disease. 54) 55) Which of the following is a disadvantage of cloning as a propagation technique? A) Cloning is time-consuming, with slow results. B) Cloned organisms are dangerous and unpredictable. C) Cloning produces monocultures that can potentially be wiped out by a single disease. D) Cloning is more expensive and more difficult than growing from seeds. 55) 56) Foreign genes can be inserted into a single plant cell that is then cultured to produce A) genetically modified seeds. B) new plant species. C) clones of the organisms from which the genes were taken. D) a genetically modified plant. 56) 57) What is the evolutionary advantage of the very long life span of some plants? A) the ability to adapt to changing environments B) the ability to grow back after being damaged. C) the ability to produce many offspring over many years D) the ability to develop resistance to many diseases 57) 6 58) Which part of this root tip is the apical meristem? A) part A 58) B) part B C) part C D) part D 59) Which part of this seed contains stored food to allow the seed to grow until it can perform photosynthesis? A) part A B) part B C) part C 7 D) part D 59) After reading the paragraph, answer the question(s) that follow. The redwood groves in Northern California are one of America's greatest natural resources. Redwoods can live more than 2,000 years and grow taller than 350 feet. When tourism became popular in the late 1800s, large tunnels were cut through the center of several of these giant trees to allow wagons to pass through (and to attract tourists to the location). Even today, visitors wait in line to be photographed driving their cars through a tunnel. When the groves were converted into national parks, the tunneling was discontinued, but several tunneled trees are still alive. 60) Which of the following choices correctly states the sequence of tissues a tunnel would pass through (starting from the outer surface of the tree and passing through the central core)? A) epidermis, cortex, primary phloem, primary xylem, heartwood, sapwood B) heartwood, wood rays, cork cambium, secondary xylem, secondary phloem, vascular cambium C) cork, cork cambium, secondary phloem, vascular cambium, sapwood, heartwood D) bark, wood rays, growth rings, lateral meristems, primary phloem, secondary phloem 60) 61) When the redwood tunnels were first constructed, not much consideration was given to the long- term effects of a tunnel on a tree's health. Nevertheless, many trees have survived more than 100 years after the tunnel was cut through their trunks. This is possible because A) the secondary xylem and phloem run vertically on either side of the vascular cambium and aren't completely disrupted by the tunnel. B) mature cork cells are dead, so their loss doesn't disrupt nutrient and water transport. C) the remaining heartwood is able to transport water and nutrients through the trunk. D) the wood rays run laterally through the trunk, so water and nutrients can still travel to all the tree's tissues. 61) 8 Answer Key Testname: UNTITLED1 1) A 2) C 3) D 4) D 5) C 6) C 7) B 8) C 9) C 10) C 11) A 12) A 13) B 14) A 15) D 16) A 17) A 18) C 19) D 20) B 21) B 22) D 23) A 24) A 25) C 26) B 27) C 28) C 29) B 30) B 31) C 32) B 33) C 34) D 35) D 36) D 37) D 38) C 39) D 40) B 41) D 42) D 43) B 44) D 45) D 46) D 47) A 48) C 49) B 50) C 9 Answer Key Testname: UNTITLED1 51) C 52) D 53) C 54) C 55) C 56) D 57) C 58) C 59) D 60) C 61) A 10 ... View Full Document

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