Horticulture Exam 2 -NCSU HS 201 Questions with Accurate Answers

Horticulture Exam 2 -NCSU HS 201 Questions with Accurate Answers Chromosomes are .... made up of chromatin which carry the plants hereditary traits. Cross pollination is ..... when pollen in transferred from one flower to another flower on another plant either by bees or by a plant breeder. Fertilization is .... when the genetic information from the pollen is transferred into the ovule by the pollen tube and unites with the genetic information in the ovule. Meiosis is ..... a process where the chromosomes do not replicate, the cell divides, and the two cells produced each have half of the chromosome number of the parent cell. Mitosis is .... a process where the chromosomes are replicated, the cell divides, and two identical daughter cells are produced. Self fertilization is ..... when pollen from one flower is transferred to another flower on the same plant or when pollen is transferred from the anthers and fertilizes the ovules in the same flower. Self pollination Pollen is transferred from the anthers of a flower to the stigma of a flower on the same plant. Imbibition When a seed absorbs water Radicle The first root of a seedling Hypocotyl The first stem of a seedling Dehiscence When a seed capsule splits open and scatters the seed Cross pollination Pollen is transferred from the anthers of a flower to the stigma of a flower on a different plant within the same species. Emasculation Removal of the male flower parts of a flower to control pollination in a cross. Cotyledon Seed leaves True leaves The leaves that match the parent plant and photosynthesis What of the following is not a goal that plant breeders work towards when they are designing their crosses? Greater requirement for water and irrigation Breeding to induce sterility or infertility is one way to prevent bans on invasive species. True Cross pollination occurs through which of the following Insect Pollination Wide Crosses Hand Pollination Which of the following is NOT a valid argument in favor of GMOs? They will end world hunger. Why do plant breeders emasculate (remove the anthers) flowers during selective breeding? To control who the father is during crosses What are the 3 vegetative structures that can be used for propagation? leaf, stem, and root Roots are the only structure that can be used in sexual propagation. False Why does shade cloth improve the chances that a cutting will root? It keeps the cuttings cooler. When plants are grown in micropropagation, they must be acclimated because They have been growing in a high humidity environment and have no functioning stomata. Which of the following is NOT a method of asexual plant propagation? Seeds Which of the following is a characteristic of a good propagation medium? -Holds water well -Provides good aeration and drainage -Free from diseases -Dense enough to hold the cutting upright