Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 26, Problem 3RQ
Seed plants are.
- all homosporous
- mostly homosporous with some heteros porous
- mostly heteros porous with some homosporous
- all heterosporous
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Chapter 26 Solutions
Biology 2e
Ch. 26 - Figure 26.8 At what stage dees the diploid zygote...Ch. 26 - Figure 26.15 If a flower lacked a megasporangium,...Ch. 26 - Seed plants are. all homosporous mostly...Ch. 26 - Besides the seed, what ether major structure...Ch. 26 - In which of the following geological periods would...Ch. 26 - Which of the following structures widens the...Ch. 26 - Which of the following traits characterizes gym...Ch. 26 - Megasporocytes will eventually produce which of...Ch. 26 - What is the ploidy of the following structures...Ch. 26 - In the northern forests of Siberia, a tall tree is...
Ch. 26 - Which of the following structures in a flower is...Ch. 26 - Pollen grains develop in which structure? the...Ch. 26 - In the course of double fertilization, one sperm...Ch. 26 - Corn develops from a seedling with a single...Ch. 26 - Which of the following plant structures is not a...Ch. 26 - White and sweet-smelling flowers with abundant...Ch. 26 - Abundant and powdery pollen produced by small,...Ch. 26 - Plants are a source of food fuel medicine all of...Ch. 26 - The Triassic Period was marked by the increase in...Ch. 26 - What role did the adaptations of seed and pollen...Ch. 26 - The Mediterranean landscape along the sea shore is...Ch. 26 - What are the four modern-day phyla of gymnosperms?Ch. 26 - Some cycads are considered endangered species and...Ch. 26 - What are the two structures that allow angiosperms...Ch. 26 - Biosynthesis of nectar and nutrient-rich pollen is...Ch. 26 - What is biodiversity and why is it important to an...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following is not the main characteristics of Liverworts. Choose 3 The columella is absent in the capsule Pseudolaters are present in the capsule gametophyte plant is either thalloid or foliose dehiscence of the capsule takes place by separation of the lid each cell has one chloroplast with a pyrenoidarrow_forwardThe male gametophyte of the moss looks identical to the female from the naked eye, but the photo below (I.s. at 4x and then at 40 x) shows that the tip contains the structures where male gametes are produced.arrow_forwardIn flowers, the structures that produce male gametophytes are called _______ ;the strcutures that produce female gametophytes are called _______ . a. pollen grains; flowers c. anthers; stigma b. stamen; carpels d. megaspores; microsporesarrow_forward
- Club mosses, horsetails, and ferns are ___ plants. a. multicelled aquatic b. nonvascular seed c. seedless vascular d. seed-bearing vasculararrow_forwardFigure 25.24 Which of the following statements about the fern life cycle is false? Sporangia produce haploid spores. The sporophyte grows from a gametophyte The sporophyte is diploid and the gametophyte is haploid. Sporangia form on the underside of the gametophyte.arrow_forwardFigure 23.28 Which of the following statements about the Laminaria life cycle is false? In zoospores form in the sporangia. The sporophyte is the 2n plant. The gametophyte is diploid. Both the gametophyte and sporophyte stages are multicellular.arrow_forward
- The following structures are found on the underside of fern leaves and contain sporangia: sori rhizomes megaphylls microphyllsarrow_forwardIn flowrers, the structures that produce male gametophytes are called ______; the structures that produce female gametophytes are called _______. a. carpels; stamens b. pollen grains; flowers c. anthers; carpels d. megaspores; microsporesarrow_forwardWhich of the following is NOT a characteristic of the gametophyte stage of the flowering plant? -The gametophyte is diploid -Male and female gametophytes are separate from one another -The gametophyte is haploid -The gametophyte is dependent on the sporophyte for a specific amount of time -The gametophyte is a gamete producing structurearrow_forward
- Which of the following is NOT a caharacteristic of all seed plants? 1. a sporic life cycle 2. cell walls containing cellulose 3. life cycle is dominant in the sporophyte phase 4. reproductive organs found in flowers 5.nearlly all are photo-autotrophicarrow_forwardLabel the Heterosporous Vascular Plant life cycle: A: Microgametophyte B: Antheridium C: Archegonium D: Zygote E: F: G: H: J: K: Meiosis L: M:arrow_forwardExplain it by bullet. Division Cycadophyta: Cycads Internally, cycad stems are similar to those of seed ferns—a thick cortex containing secretory ducts surrounds a small amount of manoxylic (parenchymatous) wood. Unlike seed ferns, cycad foliage leaves do not bear ovules. Cycads produce seed cones and pollen cones, each on separate plants. Seed cones are variable, with those of Cycas revoluta usually considered the most relictual. Although Cycadophyta was a much larger group with many more species in earlier times,currently, it contains 9 or 10 genera and approximately 100 species.• They are almost all tropical with an unusual distribution; some occur in Cuba and Mexico, others in Australia, still others in southeast Asia or Africaarrow_forward
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