IDENTIFY: 1. The first dicot group to diverge from the gymnosperms. 2. Fungal hypha containing two distinct unfused nuclei of complementary mating types.
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A: The correct option is 2 . Pollen grain
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A:
Q: Antipodals are the main site of attachment when the pollen tube reaches the embryo sac.
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Q: Marchantia is specifically considered a Liverwort, which are classified under the larger group known…
A: Liverwort are plants that do not have vascular system.
Q: 3. Structure that produces pollen Filament Stigma Style 2- 3- Anther 4-
A: Stamen Pollen producing reproductive organ of a flower. This consists of two parts: The Anther or…
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A: Note -We are supposed to answer first 3 bits. So here is the answer for first 3 bits. Please post…
Q: Explain the following bullets: Division Cycadophyta: Cycads Internally, cycad stems are similar to…
A: Cycads are the seed plants that have a stout and woody trunk with a crown of large, hard, evergreen…
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IDENTIFY:
1. The first
2. Fungal hypha containing two distinct unfused nuclei of complementary mating types.
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- 9-10. What groups of gymnosperms have flagellated sperms?11. This is sometimes called the Age of Cycads.12. Cycads contribute to soil fertilization due to their symbiotic relationship withthese organisms.13. These are water conducting cells of gymnosperms.14-15. Mention two gymnosperms with medicinal values.9. Label the sporangia, indusium, leaf, and spores in Figure 4 below. 01 Figure 4. Cyrtomium leaf c.s., sorus l.s. 10. Explain the mechanism of spore dispersal in ferns with sori 11. In what way is this mechanical method of spore dispersal similar to that in the bryophytes? Photo by Carolyn Alling Most ferns produce only one kind of spore and are therefore homosporous. Upon germination, the spore, the first cell of the gametophytic generation, gives rise to a heart shaped, bisexual gametophyte, called a prothallus. 12. What type of nuclear division produces the many celled gametophyte from a spore? Examine the fern gametophytes under the dissecting scope. Note the many rhizoids emerging from the lower, or ventral, surface. Among the rhizoids you will find antheridia, some of which may contain sperm cells. Nearer the notch of the "heart" you will find the archegonia. In order to visualize their shape in three dimensions, you will have to focus up and down on the archegonia. Examine the…Identification: 1. In the moss gametophyte, this structure contains the haploid female gamete. 2. It refers to the production of two different types of spores (megaspore and microspore). 3. The embryos of corn and other grass seeds are partial enclosed in a protective sheath called?
- Figure 24.17 Which of the following statements is true? A basidium is the fruiting body of a mushroom-producing fungus, and it forms four basidiocarps. The result of the plasmogamy step is four basidiospores. Karyogamy results directly in the formation of mycelia. A basidiocarp is the fruiting body of a mushroom-producing fungus.Figure 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.16. Label the following on Figure 5 below: Antheridia, Archegonia, Adult Sporophyte, Zygote, Egg, Sorus, Gametophyte, Sporangium, Fertilization. Meiosis Spore (n) 917 31 Spore (n) Mature dehiscing (2n) with spores (n) Immature sporangium (2n) Leaf Indusium (2n) Germinating spores (2ń) rhizoids Mature gametophyte prothallus (n) 1n 2n (2n) -Sperm (n) Leaf of a young sporophyte (2n) (n) prothallus (n) 96 (2n) Figure 5. Polystichum life cycle (drawn by Stephanie Preising, SCSU '20) Part B: Psilotum Examine the living Psilotum plant. Psilotum, is unique among living seedless vascular plants because it lacks both roots and true leaves. Note the dichotomous branching pattern of the stems. Instead of roots, Psilotum has an underground stem, a rhizome, which bears rhizoids for the absorption of water. Examine the Psilotum for the presence of sporangia, which are borne terminally on short side branches. Psilotum is homosporous, producing only one type of spore. The spores produce bisexual…
- The 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.Identify: 12. In Phaeophytes, this refers to the alternation of generation between morphologically similar sporophyte and gametophyte generation.Label the diagram which features an illustration of a portion of the sporophyte of Selaginella with strobili, and a photomicrograph of the longitudinal section of a mature strobilus. Indicate whether each of the structure you identified is haploid (n) or diploid (2n)
- Microsporogenesis, Callose wall Diploid (2n) nucleus Haploid (1n) nuclei Microspores Meiosis I Meiosis ir Microsporocyte Tetrad Vegetative nucleus Microspore nucleus Vacuole Generative cell Yegetative nucleus Pollen Mitosis I Pollen Mitosis II Sperm 'cells Released Polarised Bicellular Tricellular microspore microspore pollen pollen MicrogametogenesisThe fruiting body of the Basidiomycota (club fungi) is the; The mushroom (Basidiocarp) The true morels (ascocarp) The hyphaeComplete the following paragraph to describe the characteristics of liverworts and mosses. antheridia protonema rhizoids sexual gemmae roots archegonia fragmentation asexual 1999 binary fission gemmules thalli Reset Help Liverworts and mosses are examples of nonvascular plants. Liverworts such as Marchantia have a smooth upper surface, and a lower surface with that project into the soil. The smooth upper surface of the thallus of a liverwort contains groups of cells called cups that can produce new plant organisms asexually. During sexual reproduction in liverworts, flagellated sperm are produced by and eggs are produced by After fertilization, small sporophytes produce windblown spores. Typically, mosses can reproduce asexually by almost every part of the moss plant to produce During the life cycle of a moss, a its structure. This process allows will produce upright leafy thalli along The thalli of a moss produce antheridia and archegonia, which are involved in reproduction.