Key Haploid (n) Diploid (2n) Mature flower on sporophyte plant (2n) Germinating seed G Nucleus of developing endosperm (3.n) Anther -Embryo (2n) -Endosperm (food supply) (3n) Seed Seed coat (2n) Female gametophyte (embryo sac) Zygote (2n) FERTILIZATION € Ovary Microsporangium Microsporocytes (2n) MEIOSIS Microspore (n) Ovule with megasporangium (2n) Male MEIOSIS Polar nuclei Antipodal cells. Synergids- Egg (n)- Egg nucleus (n) Discharged sperm nuclei (n) Generative cell Tube cell gametophyte (in pollen grain) Stigma Pollen Megasporangium tube Sperm Surviving megaspore Pollen tube -Style -Pollen tube Sperm Pollen grains

Key Haploid (n) Diploid (2n) Mature flower on sporophyte plant (2n) Germinating seed G Nucleus of developing endosperm (3.n) Anther -Embryo (2n) -Endosperm (food supply) (3n) Seed Seed coat (2n) Female gametophyte (embryo sac) Zygote (2n) FERTILIZATION € Ovary Microsporangium Microsporocytes (2n) MEIOSIS Microspore (n) Ovule with megasporangium (2n) Male MEIOSIS Polar nuclei Antipodal cells. Synergids- Egg (n)- Egg nucleus (n) Discharged sperm nuclei (n) Generative cell Tube cell gametophyte (in pollen grain) Stigma Pollen Megasporangium tube Sperm Surviving megaspore Pollen tube -Style -Pollen tube Sperm Pollen grains

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter27: Reproduction And Development Of Flowering Plants

Section: Chapter Questions

Problem 4SA: In flowers, the structures that produce male gametophytes are called _______ ;the strcutures that...

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Explain the sequence of events in a flowering plant that begins with formation of a pollen tube and culminates with the formation of a diploid zygote and the 3n cell that will give rise to endosperm in a seed.
After double fertilization: a zygote and ______ form. an ovule endosperm a cotyledon asuspensor
The fertilized ovule gives rise to the fruit seed endosperm embryo
Double fertilization in flowering plants occurs by two sperms that fertilize: * 1p O polar nuclei and egg cell. egg cell and synergid cell none is correct two egg cells. egg cell and endosperm. rotic cells it consists of
(D) seeds3. With respect to angiosperms, which of the followingis incorrectly paired with its chromosome count?(A) egg—n(B) megaspore—2n(C) microspore—n(D) zygote—2n
Where in an angiosperm would you finda megasporangium?(A) in the style of a flower(B) enclosed in the stigma of a flower(C) within an ovule contained within an ovaryof a flower(D) packed into pollen sacs within the anthers found on astamen
Why is apple called a false fruit? Which part(s) of the flower forms thefruit?
E O O O O O In double fertilization, one sperm fertilizes cells in the ovule; the egg cells in the pollen tube; cells in the ovule the egg; another egg the egg; cells in the ovule the egg; another sperm to become the embryo, and a second sperm fertilizes to become the endosperm.
Part B: The Embryo Sac Examine the demonstration slide of a c.s. of a lily ovary. Find an ovule. Identify the funiculus, the chalaza, the integuments, the micropyle, and the developing female gametophyte. The latter is commonly referred to as the embryo sac in angiosperms. If your slide has several embryo sacs, they are likely to be at variable stages of development. (See text Figure 19-18b,c, page 469.) Like the female gametophyte in pine, the embryo sac develops from a megaspore. 5. Label the ovary wall, ovule, integuments, and developing embryo sac in Figures 3. and 4. below. Figure 3. Lilium ovary c.s. Photo by Carolyn Alling 126 uilid Sengit olybiolq sdh ei todW A Figure 4. Lilium ovule c.s. (Enlargement of inset of Figure 3)
Draw a diagram of L.S. of an anatropous ovule of an Angiosperm & label the following parts :- (i) Nucellus (ii) Integument (iii) Antipodal cells (iv) Secondary Nucleus.
Arrange the following flower and fruit development processes in order. (1st step to 5th step)The microspore mother cell produces haploid microspores. => stepThe flower produces pollen grains that will land on the stigma. => StepThe tube cell forms the pollen tube, anchoring on the synergid. => StepFirst sperm will fertilize the egg to form the zygote (becoming the embryo later on). => StepThe ovary wall enlarges forming the pericarp. => Step
In plants that lack endosperm in their mature seeds, the cotyledons function to (a) enclose and protect the seed (b) aid in seed dispersal (c) serve as an absorptive embryonic root (d) store food reserves (e) attach the embryo within the ovule