Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 22, Problem 2DAA
Summary Introduction
To determine: How close the male and female patches should be to form sporophytes in the absence of insects.
Concept introduction:
Mosses are flowerless, non-vascular seedless plants that reproduce using spores and have gametophyte-dominant life cycle. The spores are dispersed through water for fertilization. The sperms swim through water to reach the egg. Sometimes in search of food, small insects inadvertently transport the sperm from one plant to the egg of another plant.
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Kalanchoe is the direct production of plantlets on the tips or edges of the leaves. Leaves that act as reproductive agents are almost always thick enough to store water. In what sort of climates would you expect plants to notably benefit from this sort of reproduction?
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PLEASE ANSWER NUMBER 1,2,3, and 4 QUESTIONS: (with brief explanation only)
1. A difference between seedless vascular plants and plants with seeds is that?
A. the gametophyte generation is conspicuous in the seedless plants, whereas the sporophyte is dominant in the seeded plants.
B. the spore is the agent of dispersal in the first, whereas the seed functions in dispersal in the second.
C. the gametophyte is photoautotrophic in seedless plants but dependent on the sporophyte generation in the other group.
D. the embryo is unprotected in the seedless plants but retained within the female reproductive structure in the other group.
2. Biologist hypothesize that the first land plants had a low, sprawling growth habitat. Which of the following is part of the logic behind that theory?
A. The low sprawling growth gave them greater surface area exposed to light for photosynthesis.
B. This was prior to plants’ development of adaptations to defend themselves from predators, so by growing…
Chapter 22 Solutions
Biology: The Unity and Diversity of Life
Ch. 22 - Insect-Assisted Fertilization in Moss Moss sperm...Ch. 22 - Prob. 2DAACh. 22 - Insect-Assisted Fertilization in Moss Moss sperm...Ch. 22 - The first land plants were ___ . a. gnetophytes b....Ch. 22 - Lignin supports. the stems of ___ . a. mosses b....Ch. 22 - A waxy cuticle helps land plants ___ . a. oonserve...Ch. 22 - True or false? Ferns produce seeds inside sori.Ch. 22 - ___ attach mosses to soil. a. Rhizoids b. Rhizomes...Ch. 22 - Bryophytes alone have a relatively large ___ and...Ch. 22 - Club mosses, horsetails, and ferns are ___ plants....
Ch. 22 - Coal consists primarily of compressed remains of...Ch. 22 - Prob. 9SQCh. 22 - A seed is a(n) ___ . a. female gametophyte b....Ch. 22 - Prob. 11SQCh. 22 - Which angiosperm lineage includes the most...Ch. 22 - Match the terms appropriately. ____ bryophyte a....Ch. 22 - Match the terms appropriately. ____ ovule a....Ch. 22 - Place these groups. in order of their appearance...Ch. 22 - Early botanists admired ferns but found their life...Ch. 22 - In animals, meiosis of germ cells produces...Ch. 22 - Consider a cherry pit, which is a seed with a...Ch. 22 - Suppose you wanted to make a science fiction film...Ch. 22 - Lignin and vascular tissue first evolved in...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Your 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_forwardAnd some plants as stigma becomes receptive to Polin able to facilitate a pollen tube at a different time from when the anthers ripen. How would this affect the plant reproductive strategy why would this increase diversity in the plants offspring?arrow_forwardWhich of the following pairs of plant structure has the haploid number ofchromosomes? A. Megaspore mother cell and antipodal cells B. Egg cell and antipodal cells C. Egg cell and endosperms D. Microspore mother cell and antipodal cellsarrow_forward
- You are studying a type of plant known as " rockcress" or Arabidopsis sp. You discover a mutant in which the central cell of the female gametophyte cannot be fertilized. What structure will not form in these mutant plants? Synergids Pollen tube Endosperm Egg cellarrow_forwardMany biology labs use slides of root tips to demonstrate the stages of mitosis. Why is this a better choice than using a slide of a mature leaf?arrow_forwardThe drooping, bell-like flower Aquilegia canadensis is adapted for cross-pollination. However, if the plant has not been pollinated previously, self-pollination can occur. However, if cross pollination occurs after self-pollination takes place, the pollen from cross pollination reaches the style before the pollen from self-pollination. Using course concepts and vocabulary 1) Provide a reasoning for this phenomenon. 2) Would this adaptation for reproduction be beneficial for the plant?arrow_forward
- The rapid turgor movements of the sensitive plant (Mimosa pudica) are rare in the Plant Kingdom. If all plants evolved such movements, would the phenomenon have possible survival value or other value to the plants? Explain.arrow_forwardThere is an evolutionary trend for more basal plants to be gametophyte dominant, but more derived plants to be sporophyte dominant. Suggest one reason why there might have been an evolutionary advantage to spending more time in the sporophyte generation.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
- EVOLUTION LINK Like stems in general, some vines are herbaceous and others are woody. Tropical rain forests have a greater diversity of vines than in any other environment on Earth, and most of these vines are woody. Develop a hypothesis to explain why natural selection has favored the evolution of more species of woody vines (as opposed to herbaceous vines) in tropical rain forests.arrow_forwardWhich of the following is not a characteristic of plants? (a) cuticle (b) unicellular gametangia (c) stomata (d) multicellular embryo (e) alternation of generationsarrow_forwardInsect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg suspected that they sometimes hitch a ride on crawling insects or mites (tiny animals related to spiders). To test this hypothesis he carried out an experiment. He placed patches of male and female moss gametophytes in dishes, either next to one another or with water-absorbing plaster between them. The plaster prevented sperm from Swimming between plants. He then looked at how the presence or absence of insects affected the number of sporophytes formed. FIGURE 22.8 shows his results. FIGURE 22.8 Sporophyte production in female moss patches with and without either crawling insects (springtails) or mites. No Sporophytes formed in the animal-free dishes when moss patches were 2 or 4 centimeters apart Does this study support the hypothesis that insects and mites aid moss fertilization?arrow_forward
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