Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 22, Problem 8RQ
Summary Introduction
To determine:
The pollen grain and its role that it played in helping plants colonize in dry land.
Introduction:
Pollen grain is a microscopic structure that contains the “male reproductive cell” of a plant. It plays an important role in fertilization process. Pollen is a powdery substance and different plant species have different structure and shape of the pollen. Pollen is produced by the anthers of stamens in flower. Pollen grain has two layers one is exine (outer wall) and other is intine (inner wall).
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Chapter 22 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 22.1 - describe the features that distinguish plants from...Ch. 22.2 - describe the probable ancestor of plants?Ch. 22.2 - identify the closest living relatives of plants...Ch. 22.2 - describe the adaptations that equip plants for...Ch. 22.2 - In stark contrast to the stinking corpse lily and...Ch. 22.3 - Why are all nonvascular plants short?Ch. 22.3 - In each of these photos, is the pictured structure...Ch. 22.3 - Can you think of some adaptations that help...Ch. 22.3 - What are the advantages and disadvantages of wind...Ch. 22.3 - Which Plant Provide Us with the Most Food?
Ch. 22.3 - Prob. 1CYLCh. 22.3 - describe the major plant taxonomic groups and...Ch. 22.3 - describe the key steps in the life cycles of...Ch. 22.3 - The stinking corpse lily harms species it...Ch. 22.4 - In the initial trials with Argemone mexicana in...Ch. 22.4 - describe some of the effects that plants have on...Ch. 22.4 - Perhaps surprisingly, a parasitic lifestyle is not...Ch. 22 - In an alternation of generations life cycle,...Ch. 22 - Which of the following are not nonvascular plants?...Ch. 22 - Which of the following structures is present in...Ch. 22 - In which of the following is the gametophyte stage...Ch. 22 - Prob. 5MCCh. 22 - Scientists hypothesize that the ancestors of...Ch. 22 - Plant adaptations to life on land include a(n)...Ch. 22 - Seedless vascular plants must reproduce when...Ch. 22 - Three groups of nonvascular plants are __________,...Ch. 22 - What is meant by alternation of generations? What...Ch. 22 - Prob. 2RQCh. 22 - Describe evolutionary trends in the life cycles of...Ch. 22 - From which algal group did green plants probably...Ch. 22 - Prob. 5RQCh. 22 - Prob. 6RQCh. 22 - Prob. 7RQCh. 22 - Prob. 8RQCh. 22 - Prob. 9RQCh. 22 - Prob. 1ACCh. 22 - Prob. 2AC
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- 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_forwardIs seed coat part of sporophyte generation or gametophyte generation?arrow_forwardWhat would happen to a certain type of flower if its natural pollinator were killed by an insecticide?arrow_forward
- Which is common to the life cycles of both flowering and non-flowering plants? a) produce fruit b) stay dormant c) pollination d) producing conesarrow_forwardWhy do seedless plants need moisture to reproduce?arrow_forwardOf the four parts of alteration of generations cycle (embryo/sporophyte, spore, gametophyte, gamete), which one does pollen belong to?arrow_forward
- Under what conditions is it selectively advantageous for a plant to produce offspring identical to itself?arrow_forwardWhat is the name of the grass family? About how many species does it contain? Name seven genera (and give the common names) of grasses that are used for food. What kind of pollination do grasses have—animal or wind?arrow_forwardHow long does it take for marigold/rice/wheat/coconut/mango plants to come to flower?arrow_forward
- What is the name for plants that live in, and are adapted for, dry conditions?arrow_forwardList four features which enable the Xeric plants to survive in the desert conditions.arrow_forwardHow does an exclusive relationship between a plant and its pollinatorbenefit each partner? What are the risks of exclusive partnerships?arrow_forward
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