EP BIOLOGY:SCIENCE F/LIFE...-MOD.ACCESS
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ISBN: 9780134839530
Author: BELK
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Chapter 25, Problem 8LTB
Summary Introduction
Introduction:
The first stage of plant growth is the emergence of the seedling, supported by the seed's internal food stores, that is endosperm. The emergence of an embryo from a seed is called germination.
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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
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olybiolq sdh ei todW A
Figure 4. Lilium ovule c.s. (Enlargement of inset of Figure 3)
There are two types of Aerial stem. Erect and _______.
Comparison of Vigna radiata (dicot) and Zea mays (monocot) seeds.
Parameter
Number of cotyledon
Presence of endosperm
Visible parts
Phaseolus vulgaris (dicot)
Zea mays (monocot)
Chapter 25 Solutions
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- Which mature seed (eudicot or monocot) lacks an endosperm? What happened to it? (Hint: think about the cotyledons)arrow_forwardIn an angiosperm life cycle, sexual reproduction includes: meiosis within the male gametophyte to produce sperm. meiosis within the female gametophyte to produce eggs. meiosis within the ovary to produce megaspores. fertilization leading to development of microspores. fertilization leading to development of megaspores.arrow_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_forward
- Figure 14.26 If a flower lacked a megasporangium, what type of gamete would it not be able to form? If it lacked a microsporangium, what type of gamete would not form?arrow_forwardChoose one of the possible answers in the brackets to fill in the blank. During (simple dormancy/organic dormancy), seed only requires proper light and moisture for germination. During (simple dormancy/organic dormancy), the property of the seed prevents germination, even with light and moisture.arrow_forwardIn the lifecycle of an angiosperm, male pollen is produced in the ______ and is transferred to the ______on a carpel through the process of pollination (fill in the blanks) Group of answer choices Anther, Stigma Stamen, Petal Anther, Sepal Stamen, Receptacle Anther, Receptaclearrow_forward
- Flowers are adaptations for _______arrow_forwardWatch the documentary “What Plants Talk About” at this address: https://www.dailymotion.com/video/x1vz6pw Describe in detail a characteristic of plants you did not previously know. Be able to write a minimum of ten sentencesarrow_forwardIn seed-bearing plants, the _______________ develops into the seed following fertilization The microsporangium. The sporophyte. The endosperm. The ovule. The pollen grain.arrow_forward
- In flowers,the structure that produce male and female gametophytes are called______and____arrow_forwardWoody stems which are ______ and _______.arrow_forwardThe term hypocotyl refers to the portion of the embryonic stem that is located below the attachment of the cotyledons. Is the statement true or falsearrow_forward
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