Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Chapter 21, Problem 2RQ
Explain the evolutionary changes in plant reproduction that adapted plants to increasingly dry environments.
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Chapter 21 Solutions
Biology: Life on Earth
Ch. 21 - 1. Scientists hypothesize that the ancestors of...Ch. 21 - Plant adaptations to life on land include a(n)...Ch. 21 - 3. Seedless vascular plants must reproduce when...Ch. 21 - 4. Three groups of nonvascular plants are _______,...Ch. 21 - 1. What is meant by “alternation of generations”?...Ch. 21 - 2. Explain the evolutionary changes in plant...Ch. 21 - Describe evolutionary trends in the life cycles of...Ch. 21 - Prob. 4RQCh. 21 - List the structural adaptations necessary for the...Ch. 21 - The number of species of flowering plants is...
Ch. 21 - List the adaptations of gymnosperms that have...Ch. 21 - What is a pollen grain? What role has it played in...Ch. 21 - The majority of all plants are seed plants. What...Ch. 21 - You are a geneticist working for a firm that...Ch. 21 - 1. Prior to the development of synthetic drugs,...Ch. 21 - 2. Only a few hundred of the more than 200,000...
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- Discuss the role of phytohormones, fertilizers and pesticides, and genetic engineering in the development and growth of plants. Describe how the environment has a significant impact in plant growth and development.arrow_forwardDescribe evolutionary trends in the life cycles of plants.Emphasize the relative sizes of the gametophyte andsporophyte.arrow_forwardCompare and contrast the development of monocot and eudicot leaves.arrow_forward
- Explain why seedless vascular plants are not considered to be fully successful terrestrial plants even though they se widespread throughout the planet and contain vascular tissues for transporting materialsarrow_forwardExplain how the sunflower plant has is adapted to fit its current environment and how climate change could affect that adaptationarrow_forwardDiscuss some environmental challenges of living on land and describe how several plant adaptations meet these challenges.arrow_forward
- i) list TWO adaptations that show that the plant conserves water.ii) Photosynthetic cells produce starch and may be stored. Describe how one may test for the presence of starch on a piece of potato tissue. iii) Give TWO characteristics of monocotyledonous plants. d. The transition of plants from an aquatic environment to a terrestrial one has broughtabout many evolutionary adaptations for plants to survive on land. Give ONE adaptationfor each of the following divisions:i) Mosses: ii) Gymnosperms.arrow_forwardDiscuss the adaptations that have enabled flowering plants to overcome the following problems associated with life on land.* The absence of an aquatic environment for reproduction.* The absence of an aquatic environment to support the plant body.* Dehydration of the plant.arrow_forwardCompare and contrast the plant alternation-of-generations life cyclewith the human life cycle.arrow_forward
- Identify three major functions of roots. Describe two types of specialized stems. What is each type of stem specialized for? Discuss the main parts of an angiosperm leaf. Predict how the stem of a desert plant might be specialized for its environment. Contrast a taproot system with a fibrous root system. Relate leaf variation to environmental variation.arrow_forwardThe 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_forwardTo explain the increase in mass of the light-grown plants, identify one inorganic source of new plant mass and connect it to the cellular process underlying the increase in mass.arrow_forward
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