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 4FTB
Three groups of nonvascular plants are _______, ______, and _______. Three groups of seedless vascular plants are ____ ____, _______. And _______. Today, the most diverse group of plants is the _______.
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Seedless vascular plants must reproduce when conditions are wet because their sperm must_______________ . Two adaptations that allow seed plants to reproduce more efficiently on dry land are_________ and_________ . The seed plants fall into two major categories: the nonflowering_______________ and the flowering_________ . Flowers were favored by natural selection because they__________ . Fruits were favored by natural selection because they_____________ .
In bryophytes, male gamete called ______________________needs ______________so it could get to the female gamete which is called the ____________________. The gametophytes generation is ____________________compared to sporophytes generation.
This is about bryophytes, can you help? I want to check my answer
Members of the cactus family in North and South America and of the spurge family in Africa are very similar in structure. In both cases the plants live in desert environments. They have a succulent stem that stores water, no leaves (reduces water loss), stems that can perform photosynthesis, and spines that protect the plant from being eaten. The spines are formed from different parts of the plant in the two families. The two plant families are not closely related.
The similarities between the two families is due to ______ which is caused by ________.
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
- Figure 25.6 Which of the following statements about plant divisions is false? Lycophytes and pterophytes are seedless vascular plants. All vascular plants produce seeds. All non-vascular embryophytes are bryophytes. Seed plants include angiosperms and gym nosperms.arrow_forwardClub mosses, horsetails, and ferns are ___ plants. a. multicelled aquatic b. nonvascular seed c. seedless vascular d. seed-bearing vasculararrow_forwardThe land plants are probably descendants of which of these groups? a. green algae b. red algae c. brown algae d. angiospermsarrow_forward
- Draw the gametophyte and sporophyte stage of each representatives of nonvascular plants. Label the parts. Liverworts: Hornworts:arrow_forwardYou are asked to survey an area and identify all plant and animal species you come across. On your survey, you come across a plant you are not familiar with and must do some research to figure out what it is. To do this, your first step is to determine whether this plant is classified in the class Monocotyledonae or a Eudicotyledonae. Explain how you can tell if this plant is a Monocot or Eudicot by describing the differences in their flowers, seeds, roots, stems, and leaves. 1.arrow_forwardWhich plant category is predictably heterosporous? non-vascular plants seedless vascular plants seeded vascular plants all are heterosporousarrow_forward
- Recent DNA evidence suggests to some plant taxonomists that the traditional way of classifying flowering plants is not correct, and that flowering plants need to be completely reclassified. Other botanists disagree, saying it would be chaotic and unwise to disregard the historical classification groups. Argue for an against keeping traditional classification schemes.arrow_forwardA plant that uses cones to produce seeds via sexual reproduction would belong to which category or categories of plants? Choose all that apply. Vascular plants Non-vascular plants Gymnosperms Angiospermsarrow_forwardComplete this table: Comparison of Important Characteristics of Land Plants Features Moss Fern Conifer Flowering Plant Gametophyte or sporophyte dominant Gametophyte Sporophyte Vascular tissue (+/-) No vascular system Seed (+/-) No seeds Fruit (+/-) Water required for fertilization Pollen grain (+/-) Homosporous or heterosporous Homosporous Homosporous Heterosporous Heterosporous Examplesarrow_forward
- FILL UP THE TABLE WITH 1=PRESENT AND 0=ABSENT Xylem Wood and Phloem Seeds Chloroplast Cuticle and Flower Chlamydomonas Marchantia Psilotum Gingko |xora Construct a phylogenetic tree for the following OTU and use bars to denote their apomorphiesarrow_forwardAristotle’s taxonomic category of higher plants (in botany) would include all of the following except: the club mosses the gymnosperms (naked seed plants, like pine trees) the algae the angiosperms (flowering plants, like apple trees) the ferns.arrow_forwardCharacteristics of orders Laurales, Magnoliales, Piperales Plant type (monoecious or dioecious):_____ Leaf shape:______ Seed size and shape:_____ Other characteristics (aromatic or not):_____arrow_forward
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