Botany > QUESTIONS & ANSWERS > Plant Growth and Development Final Exam 2022 with complete solution. Graded 100% (All)

Plant Growth and Development Final Exam 2022 with complete solution. Graded 100%

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Plant Growth and Development Final Exam 2022 with complete solution. Graded 100% What is not a valuable function of somatic embryogenesis? >>seed production in plants Monocot embryogenesis differs from Dicot embryogenesis in that... >>there is no heart stage in monocots because they have only one cotyledon totipotent >>All plant cells with a functional nucleus are capable of giving rise to a whole plant Which of the plant hormones is most thought to play an important role in the degradation of the suspensor by causing senescence of these cells? >>abscisic acid What group of plants develop with the nuclei free floating (no cell wall forms) when the zygote nucleus divides? >>gymnosperms The progressive pattern of development from a fertilized zygote to a mature seed is suggestive of the progressive and sequential activation of... >>genes The 3 primary stages of embryogenesis are: >>Globular, Heart, Torpedo Seeds that desiccate and become quiescent are known as ________ seeds while those that are hydrated at the time of seed shed and are unable to withstand desiccation are known as ______________ seeds. >>orthodox; unorthodox scutellum >>cotyledon; this structure helps absorb the endosperm As the embryo matures and seed start to ripen, the maturing seed's dry weight stays constant but the fresh weight declines. This is due to ... >>the maturing seed loosing water and dessicating to 10 to 15% moisture content What are reasons for a plant to produce seed? >>- survival of the species - spreading species to new areas - evolution T/F: Gibberellins in the seed alurone layer stimulates the release of starch during seed germination. >>False What is the first general phase of germination? >>Emergence of the radicle Freshly harvested seeds of many plants will not germinate or germinate poorly. They require a period of warm, dry storage for a few weeks to a few months depending on species. This process is.... >>afterripeningWhich phytohormone combinations stimulate germination? >>- Gibberellins + cytokinins + abscisic acid - Gibberellins + cytokinins - Gibberellins During seed germination, imbibition of water occurs in a ___________ pattern. >>triphasic Radicle emergence involves cell growth and rupture of the tissues surrounding the embryo, but typically does NOT involve ___________. >>cellular division What is the photoreceptor involved in response to light? >>phytochrome T/F: In embryo dormancy, the removal of the seed coat will result in germination. >>False The average size of a vegetative apical meristem is... >>150 - 200 μm The cells in the area immediately above the youngest leaf primordia tend to be very small with a high _____________ ratio. >>nucleus : cytoplasm Determinate growth in plants can be regulated by terminal flowering as in many grasses or _________________ in other plants. >>genetics The cells in the two to five outermost layers of the apical meristem are referred to as the _________. >>tunica Differentiation >>the process whereby cells from a common origin become different plastochron >>The time interval between the initiation of two successive leaves Synthesis of RNA in the central zone is reported to be less active than in the peripheral zone because _______________. >>these cells are relatively inactive and divide infrequently divide in the vegetative state Cells in the tunica layers primarily divide at right angles to the surface or.... >>anticlinally Which of the following factors can contribute to the duration of plant growth. >>all are correct

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