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Plant Science Exam 2
| Question | Answer |
|---|---|
| Which of the following is the only leaf part that is found both on dicots and monocots? a) collar b) petiole c) sheath d) blade e) stipule f) auricle | d. blade |
| The basic design of plant stems is a series of these 2 components. a. nodes and internodes b. axillary and apical buds c. petioles and stipules d. branches and blades e. sheaths and collars | a. nodes and internodes |
| The purpose of this structure is to protect the apical meristem during root growth. a. node b. ligule c. cotyledon d. root cap e. crown | d. root cap |
| What is the major function of root hair? a. anchor the plant b. absorb water and nutrients c. store energy d. protect the root | b. absorb water and nutrients |
| What is the part of a grass leaf that wraps around the stem and attaches it to the stem? a. ligule b. auricle c. sheath d. petiole e. stipule | c. sheath |
| Brace roots are a type of adventitious root because these roots originate from? a. root branches b. stems c. seeds d. root hairs e. root caps | b. stems |
| All grass crops (monocots) like corn and wheat have the type of root system in which all roots are of similar size. a. tap root b. fibrous c. seminal d. adventitious e. creeping | b. fibrous |
| This growth measurement is the amount of leaf area per land area and is meaningful because it closely relates to a plant's ability to intercept light. a. crop growth rate b. relative crop growth rate c. leaf area index d. net assimilation rate | c. leaf area index |
| Compressed underground stem tissue with many nodes/buds that is a characteristic of potatoes and the weed yellow nutsedge. a. root cap b. tuber c. corm d. radicle e. coleoptile | b. tuber |
| What is a the term for a leaf surface that is covered with hairs? a. glabrous b. pubescent c. adventitious d. herbaceous e. temperate | b. pubescent |
| Horizontal above-ground stem typical of bermudagrass. Crown Tiller Corm Stolon Rhizome Tuber Bulb | Stolon |
| Additional vertical stems that grow from the base of grass plants. Crown Tiller Corm Stolon Rhizome Tuber Bulb | Tiller |
| Stem with multiple leaf-like layers around a solid middle like tulips and onions. Crown Tiller Corm Stolon Rhizome Tuber Bulb | Bulb |
| Horizontal below ground stem that occurs in the weed Johnsongrass. Crown Tiller Corm Stolon Rhizome Tuber Bulb | Rhizome |
| Provide the major function each of these plant parts: Root, Stem, and Leaf | Root: anchorage, absorb/transport water & nutrients, store plant food Stem: transport water & nutrients, support leaves, flowers & fruits, produce new plants Leaf: Capture sunlight/photosynthesis |
| Describe (or diagram) the difference between the pattern of the leaf veins in a grass compared to the pattern in a broadleaf plant. | Grass: Parallel Broadleaf: Net |
| Describe one property of the soil that can affect the ability of roots to grow. | Soil Moisture: If its too dry, roots won't grow If its too wet, there's no oxygen and existing roots will die |
| Lodging of plant stems can occur during high winds. Describe 2 reasons why a stem may be weak and susceptible to stem lodging. | High moisture, excess nitrogen, pest damage, herbicide damage, or tall crop varieties |
| Be able to label which roots grow where on a diagram |
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