Cambell Biology 11e Vol1 For Utah Valley University Ch 1-25
Cambell Biology 11e Vol1 For Utah Valley University Ch 1-25
11th Edition
ISBN: 9781323691519
Author: Urry
Publisher: PEARSON
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Chapter 30, Problem 2TYU
Summary Introduction

Introduction: Seed plants are seed bearing plants and hence, reproduce with the help of seeds. The features of seed plants include:

  1. a) Reduced gametophytes.
  2. b) Presence of ovules.
  3. c) Presence of pollens.
  4. d) Heterospory.

Seed plants produce two spores of different sizes and sexes.

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Seed plants lack which of the following structure(s)? (a) ovules surrounded by integuments (b) microspores and megaspores (c) vascular tissues (d) a large, nutritionally independent sporophyte (e) a large, nutritionally independentgametophyte
Cleistogamous flowers are invariably autogamous because” (a) These flowers do not open at all. (b) There is no chance of cross – pollen landing on the stigma. (c) These flowers have exposed anthers and stigma. (d) These flowers are wind pollinated.
Key features of seed plants facilitating life on land include three of the following four traits. Which of these is an exception? a. Reduced gametophytes b. Pollen c. Homospory d. Seeds Which of these will most likely happen when bryophyte spores are dispersed to a favorable habitat, such as a moist soil or tree bark? a. They will germinate and grow into sporophytes. b. They will germinate and grow into haplophytes. c. They will germinate and grow into chlorophytes. d. They will germinate and grow into gametophytes. Which of the following is the purpose of having cuticles only at the upper surface of thallus of a non-vascular plant like a moss? a. Direct water and nutrient absorption b. Efficient exchange of gases c. Faster generation of osmotic pressure in leptoids d. Easier diffusion of carbon dioxide
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