WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
3rd Edition
ISBN: 9781319103316
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 19, Problem 9MC
Summary Introduction
Introduction:
Abscisic acid is produced by plants in large amounts under stressful conditions, such as water shortage. Synthesized primarily in leaves, fruits, and root tips (but also in other plant parts), this hormone has the general effect of inhibiting growth and reproductive activities under adverse environmental conditions.
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1.
a)List two characteristics of plants that make them unique.
b)Why do plants need to exchange gases with the environment?
c)Distinguish between a fibrous root and a taproot.
d)What is the main driving force for the movement of water in plants?
e)State four benefits of asexual reproduction in plants.
8.a) Describe the function of pollen in gymnosperm and angiosperm sexual reproduction.
b)What are the three most important nutrients for plant growth?
c)Why do most commercial fertilizers contain only macronutrients?
d)Name the five plant growth regulators that are found in most plants.
Double fertilization is
a) fertilization of an egg by two sperm.
b) fertilization of two eggs by the same sperm.
C) fertilization of two eggs in the same flower.
d) fertilization of an egg by one sperm and an endosperm-forming cell by another sperm.
e) fertilization of an egg and an endosperm-forming cell by the same sperm.
Chapter 19 Solutions
WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
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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
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- Classify the pictured organism. Answers a) monocot angiosperm b) dicot angiosperm c) monocot gymnosperm d) dicot gymnosperm either a) or c) Please explain which one is correct.arrow_forwarda. Describe the function of plant roots. b) Describe the function of plant shoots. c)What is the function of lignin in terrestrial plants? d)What are xylem and phloem and how do they differ? e)Exactly what is pollen? f)Exacly what is a seed?arrow_forward1) Which of the following does not affect self-shading? A) leaf area index B) phyllotaxy C) self-pruning D) stem thickness E) leaf orientationarrow_forward
- A tree produces only seedless oranges. A small branch cut from this tree produces roots after it is planted in soil. When mature, this new tree will most likely produce 7) A) a majority of oranges with seeds and only a few oranges without seeds B) oranges without seeds, only C) oranges with seeds, only D) oranges and other kinds of fruitarrow_forwardPlants do not require oxygen to produce ATP. A) True B) Falsearrow_forwardBlack spot fungus is a disease that is known to attack roses in humid climates. At first, small black spots appear on the leaves. If left untreated, the entire plant can die. From this information, what is mostly the main cause of the demise? a) The plants’ cells are unable to carry out aerobic respiration. b) The leaves are unable to manufacture enough sugar to maintain the health of the plant. c) The roots are unable to absorb enough water. d) The stems are unable to support the plant.arrow_forward
- Which of the following statements is accurate? a) All plants have identical sporangia, all producing the same type of spores b) Plants have an embryo that is protected inside (and nourished by) the gametophyte c) Gametangia produce gametes by meiosis whereas sporangia produce spores by mitosis d) Gametangia always produce haploid gametes whereas sporangia produce diploid spores e) Gametangia are multicellular structures whereas sporangia are unicellular structuresarrow_forwardAdvantages of retaining the young sporophyte as an embryo within the parent plant include the following choices:A) The embryo is protected from desiccation.B) The embryo is able to quickly replicate, producing multiple copies that can be widely dispersed.C) The embryo is able to attain nutrients supplied by maternal tissues.D) The embryo is protected from pathogens.E) The embryo is protected from ultraviolet light.arrow_forwardWhich of the following statements are true of xylem? A) It is found in all land plants.B) It assists in conducting of materials, such as water and minerals, throughout the plant.C) It can provide structural support to the plant.D) It is found in the gametophyte generation, but not in the sporophyte.E) It contains specialized cells known as tracheids and vessel elementsarrow_forward
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