Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 38.2, Problem 3CC
Summary Introduction
To explain: The reason why selfing is an advantageous procedure and yet an evolutionary dead end.
Concept introduction: Self-pollination is the pollination of a flower (in flowering plants) by a pollen grain from same or other flower on same plant. Selfing is an “evolutionary dead-end” because it causes loss of genetic diversity and seldom introduces new characters.
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Self-fertilization, or selfing, seems to have obvious disadvantages as a reproductive “strategy” in nature, and ithas even been called an “evolutionary dead end.” So it issurprising that about 20% of angiosperm species primarily rely on selfing. Suggest a reason why selfing might beadvantageous and yet still be an evolutionary dead end.
There are the two main characteristics specific to members of angiosperm and attributed as the reason for their success and diversity. What are they and explain how each contributes to the success of this group of plants
Explain, the differences between plant generations, include:
1) how can you tell which is dominant
2) gametophyte vs sporophyte
3) haploid vs diploid
4) examples from both gymnosperms and angiosperms
Chapter 38 Solutions
Campbell Biology (11th Edition)
Ch. 38.1 - Distinguish between pollination and fertilization.Ch. 38.1 - Prob. 2CCCh. 38.1 - MAKE CONNECTIONS Does the life cycle of humans...Ch. 38.2 - What are three ways that flowering plants avoid...Ch. 38.2 - Prob. 2CCCh. 38.2 - Prob. 3CCCh. 38.3 - Compare traditional plant-breeding methods with...Ch. 38.3 - Why does Bt maize have less fumonisin than non-GM...Ch. 38.3 - WHAT IF? In a few species, chloroplast genes are...Ch. 38 - What changes occur to the four types of floral...
Ch. 38 - Prob. 38.2CRCh. 38 - Prob. 38.3CRCh. 38 - A fruit is (A) a mature ovary. (B) a mature ovule....Ch. 38 - Prob. 2TYUCh. 38 - Double fertilization means that (A) flowers must...Ch. 38 - Prob. 4TYUCh. 38 - Prob. 5TYUCh. 38 - A small flower with green petals is most likely...Ch. 38 - The black dots that cover strawberries are...Ch. 38 - DRAW IT Draw and label the parts of a flower.Ch. 38 - Prob. 9TYUCh. 38 - Prob. 10TYUCh. 38 - SCIENCE, TECHNOLOGY, AND SOCIETY Humans have...Ch. 38 - WRITE ABOUT A THEME: ORGANIZATION In a short essay...Ch. 38 - SYNTHESIZE YOUR KNOWLEDGE This colorized SEM shows...
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- Please answer question 1arrow_forwardWhich of the following traits characterizes gymnosperms? a. The plants carry exposed seeds on modified leaves. b. Reproductive structures are located in a flower. c. After fertilization, the ovary thickens and forms a fruit. d. The gametophyte is longest phase of the life cycle.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
- Most extant species of gymnosperms are now considered as "living fossils", why is that so? Give some insights on why gymnosperms were not able to dominate land despite of having seeds.arrow_forwardAngiosperms ( flower bearing ) plants developed after gymnosperms ( cone bearing ) plants during the Mesozoic era Which of the following is a benefit to plants developing the ability to have flowers over cones ? ANSWER CHOICES ARE IN THE PHOTO. thanks.arrow_forwardThe Cretaceous Period was marked by the increase in number and variety of angiosperms. Insects also diversified enormously during the same period. Can you propose the reason or reasons that could foster coevolution?arrow_forward
- Plants and animals originated in water environments and, much later, plants invaded the land and later still, animals invaded the land. a) With respect to the four groups of plants (Bryophytes, seedless vascular plants, Gymnosperms, and Angiosperms), give the basic method of fertilization. That is, how do the sperm reach the eggs? b) What is the significance of the fertilization methods to the invasion of the land by the Gymnosperms and Angiosperms?arrow_forwardFerns are a type of terrestrial plant that does not produce seeds, unlike gymnosperms and flowering plants. This significant evolutionary divergence contributed to the dominance of gymnosperms and flowering plants. How might the ability to produce seeds have advantaged these groups? It allowed these plants to photosynthesize more efficiently. It allowed these plants to attract more pollinators. It allowed these plants to better disperse, colonize new habitats, and survive drier conditions. It allowed these plants to grow taller and compete for sunlight.arrow_forwardThe life cycle of the flowering plants and the gymnosperms is different in many ways. One way that they are similar however is; They both engage in double fertilization The seed coats for gymnosperms and angiosperms comes from the parent plant and is diploid Both the flowering plants and gymnosperms reproduce by using strobili Both the angiosperms and the gymnosperms are homosporous and produce one type of gametophytearrow_forward
- Which of the following is correct regarding female gametophyte development in Angiosperms? The female gametophyte develops in the anther The female gametophyte develops in an ovule within an ovary A female gametophyte develops from all four megaspores produced via meiosis All cells of the female gametophyte are haploidarrow_forwardCompare and contrast the alternation of generations in pines and angiosperms. This must be very detailed and include all major structures and process involves. Be sure to include when the plants are haploid or diploid. You can use a list as long as order is clear. Be sure to clearly write out structure and processes and indicate which things are the same and which are different.arrow_forwardHow many extant flowering plants (angiosperms) receive pollination services from animals? 1/3 1/2 3/4 1/4arrow_forward
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