Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 31.5, Problem 2CC
Summary Introduction
To determine: The function of the lacy integument of Runcaria heinzelinii based on the knowledge of the function of integument in modern seed plants.
Introduction: The integuments in modern flowering plants allow the transfer of food material from mature photosynthetic sporophytes to the young embryo. They also help ovules in flower to receive pollen.
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Chapter 31 Solutions
Biology
Ch. 31.1 - Prob. 1CCCh. 31.2 - Why did giant dragonflies exist during the...Ch. 31.3 - Prob. 1CCCh. 31.4 - What were the goals of the Browning and Gunning...Ch. 31.4 - Prob. 2EQCh. 31.4 - Prob. 3EQCh. 31.5 - Core Skill: Modeling The goal of this modeling...Ch. 31.5 - Prob. 1CCCh. 31.5 - Core Skill: Connections Look ahead to Figure...Ch. 31.5 - Prob. 2CC
Ch. 31 - The simplest and most ancient phylum of modern...Ch. 31 - Prob. 2TYCh. 31 - A seedless plant phylum that is included in the...Ch. 31 - Prob. 4TYCh. 31 - The seed plants are also known as a. bryophytes....Ch. 31 - Prob. 6TYCh. 31 - Prob. 7TYCh. 31 - Prob. 8TYCh. 31 - Prob. 9TYCh. 31 - Prob. 10TYCh. 31 - List several common traits that lead evolutionary...Ch. 31 - Prob. 2CQCh. 31 - Prob. 3CQCh. 31 - Prob. 1COQCh. 31 - Prob. 2COQ
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- In some species, sepals look like petals, and both are collectively called “tepals.” Suggest an extension to the ABC hypothesis that could account for tepals.arrow_forwardthe fruits of wild daisy has hair like structures called pappus What do these structures represent in the flower from which the fruit was derived?arrow_forwardDescribe the function of an indusium in ferns. Is there a comparable structure in horsetails? If yes, name the structure.arrow_forward
- Answer the following questions: How many carpels are fused to form an apple? How might the fleshy pericarp aid in seed dispersal? How many carpels are fused to form a tomato?arrow_forwardIn a common eudicot pattern of development for the common bean in the figure, the radicle emerges from the seed (1), then begins to develop into a primary root that grows down into the soil. As this occurs, the hypocotyl emerges from the seed and bends into the shape of a hook (2). The bent hypocotyl lengthens and pulls the cotyledons upward (3). When the hypocotyl reaches the soil surface, exposure to light causes it to straighten (4). Primary leaves emerge from between the cotyledons and begin photosynthesis. The cotyledons typically undergo a period of photosynthesis before shriveling (5). Eventually, the cotyledons fall off the lengthening stem, and the young plant’s new leaves produce all of its food. a) Identify and explain what environmental factors influence the timing and coordination of the germination of seeds.arrow_forwardIn some species, such as magnolia, sepals look like petals, and both are collectively called "tepals:' Suggest an extension to the ABC model that could hypothetically account for the origin of tepals.arrow_forward
- You want to examine the internal anatomy of seeds from Taxus and Ricinus. The plant material you obtain only consists of mature seeds - this can be challenging as mature seeds are often quite hard making it difficult to cut a longitudinal slice through the seeds from each genus. In addition to your drawings, you described (with great accuracy) what you saw as follows: A. The coyledons of the Ricinus embryo were just about visible, though often hard to distinguish, surrounded by the nutritive endosperm tissue. The seeds of Taxus were too mature to slice open but they were surrounded by the fleshy, red tissue that contains the poisonous substance taxol. B. The coyledons of the Ricinus embryo were just about visible, though often hard to distinguish, surrounded by the nutritive endosperm tissue. The seeds of Taxus were too mature to slice open but they were surrounded by the fleshy, red tissue that birds eat. C. The coyledons of the Ricinus embryo were just about…arrow_forwardWhich specimen( Psilotum Selaginella Lycopodium Equisetum ferns) MENTIONED has (have) a true indusium (protective covering of the sorus that is not from the leaf margin of the fern)?arrow_forwardYour class is studying the burrs – the seed pods – of the common burdock plant. Your lab partner notices that the burrs easily cling to clothing, as well as to each other, and that some of the spines have come loose and gotten stuck in her skin, which is somewhat painful. Based on these observations, is there a logical explanation, other than reproductive success, for why the seed might have this special structure? (a) Yes, the structure may help the seed cling to the soil so that it can take root more easily (b) yes, these structures may prevent the seeds from getting damaged or eaten by other animals (c) yes, the structures may help prevent the seeds from getting pulled from the plant by sticking to each other (d) No, they are obviously intended to attach to animals so that they can be carried and dropped elsewherearrow_forward
- Define and distinguish the following structures: sporangium, sporangiophore, sorus, strobilus.arrow_forwardWhat is a seed? What are four key adptations common in seed plants? What are the advantages of reduced gametophyte?arrow_forwardImagine that you are a member of a research group conducting research on fruit type and seed dispersal. Your group has submitted a paper to a peer-reviewed journal that addresses the factors that impact fruit type and seed dispersal mechanisms in plants of Central America. The editor of the journal communicates that your paper may be published if you make ‘minor revisions’ to the document.Question: Why is seed dispersal important in the life of plants? What would be the consequences of having seeds that simply fell to the ground underneath the parent tree?arrow_forward
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