Q&A Hero

Q: Labeling. Ovule

Q: Respond to the following statements with reference to the flower parts listed below. a. megaspore b. microspore c. ovule d. ovary e. seed During early development, the plant embryo is most intimately associated with this structure.

Q: Respond to the following statements with reference to the flower parts listed below. a. megaspore b. microspore c. ovule d. ovary e. seed The egg is ultimately derived from this structure.

Q: Respond to the following statements with reference to the flower parts listed below. a. megaspore b. microspore c. ovule d. ovary e. seed This gives rise to haploid pollen grains.

Q: Respond to the following statements with reference to the flower parts listed below. a. megaspore b. microspore c. ovule d. ovary e. seed This structure is female and haploid.

Q: Respond to the following statements with reference to the flower parts listed below. a. megaspore b. microspore c. ovule d. ovary e. seed This structure gives rise to the female gametophyte.

Q: Respond to the following statements with reference to the flower parts listed below. a. anther b. stigma c. ovule d. ovary e. stamen Male gametogenesis occurs in this structure.

Q: Respond to the following statements with reference to the flower parts listed below. a. anther b. stigma c. ovule d. ovary e. stamen This structure produces pollen.

Q: Respond to the following statements with reference to the flower parts listed below. a. anther b. stigma c. ovule d. ovary e. stamen Fertilization of a flowering plant occurs directly inside of this structure.

Q: Respond to the following statements with reference to the flower parts listed below. a. anther b. stigma c. ovule d. ovary e. stamen A pollen tube ultimately grows into this structure.

Q: Respond to the following statements with reference to the flower parts listed below. a. anther b. stigma c. ovule d. ovary e. stamen During fertilization of a flowering plant, the male gamete first adheres to this structure.

Q: Stigma Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Sepal Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Pollen grain Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Petal Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Ovule Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Ovary Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Multiple fruit Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Microspores Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Megaspores Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Endosperm mother cell Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Embryo sac Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Carpel Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Anther Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Aggregate fruit Choose the one most appropriate answer for each. a. male spores of anthers b. site where pollen tube usually penetrates the ovule c. develops into a fruit at maturity d. a 2n cell that will help form nutrients for the developing plant embryo e. cluster of matured ovaries attached to a common receptacle f. modified leaf with pigments and fragrance-producing cells g. immature male gametophyte h. female reproductive organ i. landing platform for pollen j. pollen-bearing structure k. female spores of ovule l. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented m. female gametophyte n. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) o. forms a seed at maturity

Q: Which of the following is not true of ethylene? a. It is a gas. b. It induces abscission c. It is involved in cell reproduction. d. It is a hormone. e. It is involved in stress responses.

Q: Which of the following is not true of the term senescence? a. It may refer to cells. b. It refers to the shedding of plant parts. c. It means aging. d. It may refer to communities. e. It may refer to individuals.

Q: Tissue culture techniques are used to a. produce hundreds of identical plants. b. propagate promising mutant plants. c. improve food crops. d. increase production of commercially important hybrid plants. e. do all of these.

Q: Vegetative propagation means that a. part of a leaf, a stem, or a root, when torn away from the parent plant and planted under proper conditions, can develop into a new plant. b. a plant cannot reproduce by forming flowers, fruits, and seeds. c. the leafy part of the gametophyte can grow into a new plant if planted. d. flowers and fruits from one plant can be grafted onto another closely related plant to produce hybrids. e. all of these descriptions fit.

Q: What causes the hypocotyl of dicots to straighten? a. Light. b. Gravity. c. Wind. d. Air. e. All of these may be involved.

Q: Which of the following is not involved in seed germination? a. Cold. b. Light. c. Water. d. Abrasion. e. All of these are involved.

Q: Would a calcium deficiency be more likely to cause excess water loss or a carbon dioxide shortage for a plant (hint: think of the stoma)?

Q: What is the role of the endodermis in nutrient absorption?

Q: What manner of symbiosis is a root nodule? Explain.

Q: Why do plant roots populate the A horizon most heavily?

Q: Organic compounds become distributed through a plant by __________.

Q: By a __________, transpiration pulls water upward by creating a continuous negative pressure (or tension) inside xylem from leaves to roots.

Q: __________ is the evaporation of water from plant parts, mainly at stomata, into air.

Q: A layer of endodermal cells around the cylinder deposit a waterproof band called a __________ in their abutting walls.

Q: Nitrogen __________ by bacteria in root __________ gives a plant extra nitrogen.

Q: __________ are symbionts with young roots that enhance a plant's ability to absorb mineral ions from soil.

Q: __________ are soils that have roughly equal proportions of sand, silt, and clay.

Q: Plant growth requires steady sources of water and nutrients obtainable from __________ and soil.

Q: Respond to the following statements with reference to the five plant micronutrients listed below.a.ironb.boronc.manganesed.zince.copperDeficiency of this nutrient results in leaves with dark veins, but leaves whiten and fall off.

Q: Respond to the following statements with reference to the five plant micronutrients listed below.a.ironb.boronc.manganesed.zince.copperDeficiency of this nutrient results in chlorosis and yellow, green striping in leaves of grasses.

Q: Respond to the following statements with reference to the five plant micronutrients listed below.a.ironb.boronc.manganesed.zince.copperDeficiency of this nutrient results in chlorosis, dead spots in leaves, and stunted growth

Q: Respond to the following statements with reference to the five plant micronutrients listed below.a.ironb.boronc.manganesed.zince.copperThis nutrient plays an important role in cell wall stability.

Q: Respond to the following statements with reference to the five plant micronutrients listed below.a.ironb.boronc.manganesed.zince.copperThis nutrient is a component of many proteins, including auxin receptors.

Q: Respond to the following statements with reference to the five plant macronutrients listed below.a. nitrogenb.potassiumc.calciumd.magnesiume.phosphorusThis nutrient is essential to formation of chlorophyll and acts as a cofactor for many enzymes.

Q: Respond to the following statements with reference to the five plant macronutrients listed below.a. nitrogenb.potassiumc.calciumd.magnesiume.phosphorusThis nutrient is an important part of the backbone structure of DNA.

Q: Respond to the following statements with reference to the five plant macronutrients listed below.a. nitrogenb.potassiumc.calciumd.magnesiume.phosphorusThis nutrient is an extremely important part of ATP.

Q: Respond to the following statements with reference to the five plant macronutrients listed below.a. nitrogenb.potassiumc.calciumd.magnesiume.phosphorusThis nutrient helps to maintain turgor pressure.

Q: Guard cells Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: Transpiration Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: Translocation Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: Tracheids and vessels Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: Stylet Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: Sieve tube members Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: Nodules Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: Mycorrhiza Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: Legumes Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: Companion cells Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: Casparian strip Choose the most appropriate answer response for each question. a. responsible for opening and closing of stomata b. mouthpart of an aphid c. pipelines of the xylem d. a mutually beneficial association between a fungus and a young root e. structures on roots that house nitrogen-fixing bacteria f. pipelines of the phloem g. evaporation from stems and leaves h. actively transport sucrose into sieve tubes i. eudicot plants that tend to establish symbiotic relationships with nitrogen-fixing bacteria j. transport of organic molecules from source region to sink k. a waxy band that forces water to diffuse through cells

Q: The following questions refer to the figure above illustrating transport in phloem. ____ can indicate a fruit or developing root cells. a. A b. B c. C d. D e. E

Q: The following questions refer to the figure above illustrating transport in phloem. Bulk flow of organic compounds is indicated by a. A. b. B. c. C. d. D. e. E.

Q: The following questions refer to the figure above illustrating transport in phloem. Companion cell assisted loading of organic compounds is indicated at a. A. b. B. c. C. d. D. e. E.

Q: The generally accepted explanation for the movement of organic compounds in phloem is a. the cohesion-tension theory. b. the pressure flow theory. c. active transport. d. the transpiration-pull theory. e. root pressure.

Q: Which of the following processes does NOT serve to maintain low pressure at the receiving end of sieve tube pipelines? a. sucrose conversion into cell-wall polysaccharides b. sucrose conversion into starch in the receiving regions c. sucrose conversion to glucose, which is then used in cellular respiration d. activity of companion cells e. conversion of sucrose to fructose in fruits

Q: Which of the following are never sink regions for the pressure-flow translocation of organic compounds? a. growing leaves b. seeds c. fruits d. roots e. mature photosynthesizing leaves

Q: The movement of organic compounds in phloem is described as a. sink-to-source. b. pressure flow. c. cohesion-tension. d. active transport. e. transpiration pull.

Q: Sieve tubes are different from vessel members because they a. do not have nuclei. b. are not connected to each other. c. are alive at maturity. d. conduct minerals. e. fit all of these descriptions.

Q: Movement of soluble organic material through sieve tube members occurs through a. translocation. b. active transport. c. cohesion-tension. d. transpiration. e. facilitated transport.

Q: Carbohydrates converted to ____ are ____ in plants. a. cellulose; stored b. starch; stored c. starch; transported d. fats; stored e. glucose; transported

Q: All of the following statements are true concerning phloem tissue EXCEPT that a. it transports plant-manufactured products. b. it stores organic compounds. c. it is composed of living cells. d. only some of its cells have nuclei. e. it does not transport minerals.

Q: The stomata a. open at night in most plants. b. are open when the guard cells are swollen with water. c. close when water moves into the guard cells. d. are covered by the cuticle to reduce water loss. e. fit all of these descriptions.

Q: Which of the following factors influence the opening and closing of the stomata? a. rate of photosynthesis b. water availability c. concentration of carbon dioxide in the leaf d. light intensity e. all of these

Q: Guard cells a. surround the stoma. b. control the flow of gases between the interior of a leaf and the atmosphere. c. become turgid when it becomes light if environmental conditions are not too hot or too dry. d. may absorb water from surrounding epidermal cells. e. do all of these.

Q: An opening in leaves that functions in the exchange of gases is called a a. cuticle. b. stoma. c. guard cell. d. pit. e. pore.

Q: The cuticle a. conserves water. b. reduces absorption of carbon dioxide by the plant. c. relegates transpiration to the stomata. d. helps prevent wilting. e. does all of these.

Q: Most of the water moving through a plant is lost through a. osmotic gradients in the soil. b. evaporation. c. pressure flow forces in the xylem. d. photolysis. e. photosynthesis.