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18 questions
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  • Q1
    Invasive plant species affect the interactions of living and nonliving components of an ecosystem, so the removal of invasive plants is often necessary. The goal of most plant-control methods is to disrupt or inhibit the function of different plant systems. For example, insects can be used to chew through roots in order to reduce a plant’s ability to absorb water. Which of these functions would be most immediately affected by a reduction in water uptake by roots?
    Sunlight absorption
    Seed dispersal
    Photosynthesis
    Disease resistance
    30s
    B.10.B: Plant Systems
  • Q2
    A student reads this advertisement for a product containing a plant micronutrient that can be added to soil. Based on this information, the student can conclude that boron is absorbed by plant roots from soil and then —
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    concentrated in the roots until the plant’s reproductive tissues mature
    transported to reproductive tissues by the plant’s shoot system
    stored in plant stems until the flowers are pollinated
    transported by the phloem to the stomata in leaves, where it attracts pollinators
    30s
    B.10.B: Plant Systems
  • Q3
    A student conducted an investigation to study phototropism in grasses. The only difference between the control group and the experimental group was light conditions. The control group was provided full light, while the experimental group was shaded on one side. The diagrams show the average heights and positions of blades of grass in the investigation. Which statement best explains why the grass tips of the experimental group bent toward the light?
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    The side facing the light has a greater chance of absorbing carbon dioxide from the atmosphere
    Water evaporated faster on the side of the plant having full light
    Light sensors in the grass tips stimulated a hormone in the shoot system
    The xylem in the root system absorbed more nutrients from the shaded side
    30s
    B.10.B: Plant Systems
  • Q4
    Cytokinins are a class of plant hormones that help regulate growth by promoting cell division. Cytokinins are produced mainly in meristematic tissue, where most plant growth occurs. Which system carries cytokinins produced in the roots to the rest of the plant?
    Reproductive system
    Vascular system
    None of these
    Dermal system
    30s
    B.10.B: Plant Systems
  • Q5
    Several structures work together to allow flowering plants to reproduce. The diagram shows a typical flower. Which table correctly identifies the function of each structure or group of structures in the reproduction of the plant?
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    30s
    B.10.B: Plant Systems
  • Q6
    Plants called sundews have rounded green leaves with many hair-like structures. The ends of these structures contain enzymes in a sticky liquid that looks like nectar or moisture, as shown in the picture. The hairs do not react to dust or nonliving material but will bend inward when insects get caught in the sticky liquid. Sundews digest trapped insects over a period of a few days. Based on this information, what functions do the specialized leaves of sundews perform?
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    Provide water to the plant and perform photosynthesis
    Respond to stimuli and anchor the plant
    Provide nutrients to the plant and respond to stimuli
    Release pollen to insects and perform photosynthesis
    30s
    B.10.B: Plant Systems
  • Q7
    Structures represented in the illustration below are found in the lower epidermis of a plant leaf. The illustration at right shows the response to a certain environmental condition. The response represented in the illustration would most likely be caused by —
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    long periods of rainfall
    little available water
    a reduced supply of oxygen
    high concentrations of glucose
    30s
    B.10.B: Plant Systems
  • Q8
    The internal transport of water and minerals in plants requires that two systems work together. Which diagram correctly describes how the two systems accomplish this?
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    45s
    B.10.B: Plant Systems
  • Q9
    The diagram shows the reproductive system of a plant. Which of the following best describes the interaction that occurs between a plant’s reproductive parts during self-fertilization?
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    Pollen is released from the anther and is transferred to the stigma. A pollen tube forms and grows through the style. The pollen tube reaches the filament, where the sperm fertilizes the egg
    Pollen is released from the anther and is transferred to the stigma. A pollen tube forms and grows through the style. The pollen tube reaches an ovule within the ovary, where the sperm fertilizes the egg
    Pollen moves from the ovule up through the style and is released from the stigma. The pollen is transferred to the anther, where the sperm fertilizes the egg
    Pollen is released from the stigma and is transferred to the anther. A pollen tube grows down from the anther through the filament and fuses with the ovule, where the sperm fertilizes the egg
    30s
    B.10.B: Plant Systems
  • Q10
    Some students are instructed to put a celery stalk in a red dye solution for a lab activity. First the students carefully cut the bottom of the stalk with a scalpel. Then they put the stalk in the beaker with the solution and place the beaker on a shelf in the lab room. The next day they check the stalk and make observations. The students note that the leaves at the end of the stalk have changed color from green to red. The students cut across the celery stalk and use a hand lens to see that the small tube openings along the edge of the celery stalk are also red. The cross section is shown below. How do the plant systems work together to make this movement of liquid possible?
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    The roots anchor the plant in the soil, and the stem holds the leaves up
    The roots absorb their own water and minerals, while the stem absorbs its water and minerals through the leaves
    The roots lose water vapor to the soil, and the stem loses water vapor through the leaves
    The roots absorb water and minerals and move them up to the stem, while the stem moves food produced in the leaves down to the roots in tiny tubes
    30s
    B.10.B: Plant Systems
  • Q11
    The outermost layer of plant stems in dicotyledons consists of epidermal cells and guard cells that surround openings called stomata. The epidermal cells are usually covered with a waterproof layer that provides protection from injury and water loss. The stomata allow gas exchange. The epidermal cells and stomata have functions similar to those of which two human body systems?
    Cardiovascular and integumentary
    Skeletal and respiratory
    Integumentary and respiratory
    Cardiovascular and skeletal
    30s
    B.10.B: Plant Systems
  • Q12
    An animal can wound a tree by scratching away the bark. The tree can respond to the wound in many ways. Usually sap quickly covers the wound, and then the tree covers the wound with new growth. The diagram shows a cross section of a tree with a healed wound. What process worked most directly with the transport system to heal the wound?
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    Water intake
    Carbohydrate storage
    Cellular reproduction
    Photosynthesis
    30s
    B.10.B: Plant Systems
  • Q13
    Leaves are part of a plant’s shoot system. The xylem tissue in leaves transports —
    the wax required to coat the surface of actively growing tissue
    the water and minerals that are absorbed by the roots
    the oxygen that regulates the rate of carbohydrate production
    the bacteria needed for nitrogen fixation in root nodules
    30s
    B.10.B: Plant Systems
  • Q14
    Plant hormones serve as chemical messengers between cells and tissues. Auxin is a plant hormone that causes the cells on the shady side of a plant shoot to elongate. The response enabled by auxin is known as —
    photosynthesis
    geotropism
    phototropism
    transpiration
    30s
    B.10.B: Plant Systems
  • Q15
    Copper is a micronutrient that can be found in soil. Copper is important for reproductive growth in plants and plays an indirect role in chlorophyll production. Which statement correctly describes the interaction that occurs between the root and the shoot systems of plants to allow reproduction to occur?
    The shoot system transports copper to the roots after it is taken in through stomata in the leaves
    Copper that is absorbed by the roots is transported to reproductive tissues by the shoot system
    Copper is produced in the roots when copper-containing compounds are hydrolyzed
    The shoot system stores copper for later use by the roots and the reproductive structures
    30s
    B.10.B: Plant Systems

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