Pollen tube - Study guides, Class notes & Summaries

Flowers - specialized structure for sexual reproduction, pollination by animals (insects, mammals, birds) and wind Seed - consists of an embryo and nutrients surrounded by a protective coat. Gametophytes of seed plants - develop within the walls of spores that are retained within tissues of the parent sporophyte The ancestors of seed plants were most likely_____, while seed plants are ________. - homosporous; heterosporous Ovule - consists of a megasporangium, megaspore, and one or more p...

Test Bank for Genetics A Conceptual Approach, 7th Edition Benjamin Pierce Test Bank for Chapter 2: Chromosomes and Cellular Reproduction Multiple-Choice Questions 1. Which of the following statements is false? a. Errors in chromosome separation are rarely a problem for an organism. b. Errors in chromosome separation can result in a miscarriage. c. Errors in chromosome separation can result in cancer. d. Errors in chromosome separation can result in a child with severe handicaps. e. Erro...

How do you investigate the effect of sucrose concentration on the growth of pollen tubes? - Answer 1. Make up solutions of sucrose between 0.2-2 moldm-3 2. Collect a petri dish for each sucrose concentration and place a moistened filter paper on each 3. Collect one microscope slide per concentration 4. Place a few drops of sucrose plus mineral salt medium in the dip of each slide 5. Gently rub the point of a mounted needle over the mature anthers of a flower so the pollen falls on the slid...

Arrange the following structures, which can be found on male pine trees, from the largest structure to the smallest structure (or from most inclusive to least inclusive). a.)pollen cone, sporophyte, microspores, microsporangia, pollen nuclei b.)sporophyte, pollen cone, microsporangia, microspores, pollen nuclei c.)sporophyte, microspores, microsporangia, pollen nuclei, pollen cone d.)pollen cone, microsporangia, microspores, pollen nuclei, sporophyte correct answers b.)sporophyte, pollen c...

Bio 112 Exam 3 Janes TAMU Latest Update Graded A+ Bryophytes Characteristics Vascular: no Seed Bearing: no Dominant Generation: gametophyte Examples/Phyla: liverwort, mosses, hornwort Special features: use spores, no seeds, need water for reproduction Paleozoic or Mesozoic: Paleozoic Ferns Characteristics Vascular: yes Seed Bearing: no Dominant Generation: sporophyte Examples/Phyla: monilophyta Special features: have sporangium Paleozoic or Mesozoic: Paleozoic Gymnosperms C...

Gymnosperms (conifers) Seeds not enclosed in ripened ovary. Angiosperms (Flowering plants) Seeds are enclosed in a ripened ovary/fruit. 7 characteristics of seed plants 1. Megaphyllous leaves (branched veins w/ leaf trace gaps) 2. Heterospory [advanced] (production of spores of two different sizes and sexes) 3. Eusporangiate 4. Xylem and phloem 5. Dominant and independent sporophyte 6. Gametophyte is dependent on the sporophyte for nutrition 7. Reproduce by seeds Se...

Gymnosperms - Answer-(conifers) Seeds not enclosed in ripened ovary. Angiosperms - Answer-(Flowering plants) Seeds are enclosed in a ripened ovary/fruit. 7 characteristics of seed plants - Answer-1. Megaphyllous leaves (branched veins w/ leaf trace gaps) 2. Heterospory [advanced] (production of spores of two different sizes and sexes) 3. Eusporangiate 4. Xylem and phloem 5. Dominant and independent sporophyte 6. Gametophyte is dependent on the sporophyte for nutrition 7. Reproduce by see...

BOP CHAPTER 18 TEST QUESTIONS AND ANSWERS ALL CORRECT 2024/2025 LATEST UPDATED The daughter cells produced by a microsporocyte are: a. microspore mother cells. b. microspores. c. pollen grains. d. prothallial cells. e. generative cells. - Answer- B In pines, the immature male gametophyte consists of: a. two prothallial cells, one generative cell, and one tube cell. b. one prothallial cell, two generative cells, and one tube cell. c. one prothallial cell, one generative cell, an...

3 ways cowbirds find hosts - 1. sit high on perch and look around 2. walk on ground and look 3. drive birds off by scaring them so that they can lay their eggs 4 advantages of seed dispersal - -Avoids crowding competition -Prevents spread of disease -Prevents in-breeding -Saves some offspring from being eaten 5 adaptations of obligate brood parasites - 1. fast egg laying (20-40 sec for cowbirds) 2. thicker egg shells 3. fast hatching egg 4. removal of host egg prior to laying 5. baby ...

what are theca? - The typical anther is bilocular, i.e. it consists of two thecae. Each theca contains two microsporangia What are microsporangia? - Are the pollen sacs. Microsporangia produce the microspores, which for seed plants are known as pollen grains How many theca and sporangia are part of each anther? - Theca: 2 Microsporangia: 4 What separates the two theca? - A longitudinal groove What are the pollen sacs lined with? - tapetum cells What are tapetum cells? - Nutrition...