Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Textbook Question
Chapter 21, Problem 9RQ
The majority of all plants are seed plants. What is the advantage of a seed? How do plants that lack seeds meet the needs served by seeds?
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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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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
- In 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_forwardwhat is the importance of plant seeds in medicine and pharmacy? write a paragraph explaining it.arrow_forwardWhy seed is important to crop production?arrow_forward
- What is the purpose of hilum in seeds?arrow_forwardMany flowers have both anthers and pistils. What prevents self-pollination and later self-fertilization?arrow_forwardTheophrastus of Lesbos, Aristotle’s successor as head of the Lyceum, improved upon Aristotle’s botany by classifying all monocotyledons as flowering plants with: two seed-leaves in the embryo, branching leaf veins, and flower parts in multiples of 4 or 5 one seed-leaf in the embryo, branching leaf veins, and flower parts in multiples of 4 or 5 one seed-leaf in the embryo, parallel leaf veins, and flower parts in multiples of 3 or 6 two seed-leaves in the embryo, parallel leaf veins, and flower parts in multiples of 3 or 6 two seed-leaves in the embryo, branching leaf veins, and flower parts in multiples of 3 or 6arrow_forward
- Answer the following question: What is the difference between a fruit and a vegetable? In what ways does human welfare depend on seed plants?arrow_forwardTheophrastus of Lesbos, Aristotle’s successor as head of the Lyceum, improved upon Aristotle’s botany by classifying all dicotyledons as flowering plants with: two seed-leaves in the embryo, branching leaf veins, and flower parts in multiples of 4 or 5 one seed-leaf in the embryo, branching leaf veins, and flower parts in multiples of 4 or 5 one seed-leaf in the embryo, parallel leaf veins, and flower parts in multiples of 3 or 6 two seed-leaves in the embryo, parallel leaf veins, and flower parts in multiples of 3 or 6 two seed-leaves in the embryo, branching leaf veins, and flower parts in multiples of 3 or 6arrow_forwardWhat features not present in seedless plants have contributed to the enormous success of seed plants on land?arrow_forward
- In what ways do animals participate in the reproduction of seed plants?arrow_forwardOnion plants are biennials, which live for only 2 years. As a gardener, when should you harvest onions so they would be as large as possible?arrow_forwardHow does the reproduction of seedless plants differ from that of seed plants?arrow_forward
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