Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 40, Problem 5U
Which of the following does NOT happen as a seed approaches a state of dormancy?
a. The seed loses water.
b. Abscisic acid levels in the embryo decrease.
c. The seed coat hardens.
d. Protein synthesis stops.
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Which of the following is True?a. Ethylene stimulates abscission layers to form.b. Abscisic acid causes abscission layers to form.c. Ethylene is sometimes sprayed on flowers to keep them fresh.d. Abscisic acid stimulates seed germination.
Which of the following is true regarding germination?
a.
Imbibition of water is the first step of germination
b.
All are true regarding germination
c.
Shoots emerge first, then roots
d.
The seed coat stays intact during germination
e.
Freezing and thawing can help start germination
Four of the following are steps occur in
the earliest stages of seed germination.
Choose the fifth and last step:
Select one:
O a. Intake of water
b. Activation of the aleurone layer
O c. Cell division
d. Increase in cellular respiration
e. Mobilization of food reserves for
cell division
Chapter 40 Solutions
Biology
Ch. 40 - Which of the following is stimulated by blue...Ch. 40 - Prob. 2UCh. 40 - Prob. 3UCh. 40 - Prob. 4UCh. 40 - Which of the following does NOT happen as a seed...Ch. 40 - Dwarf mutants can sometimes be induced to grow...Ch. 40 - Prob. 1ACh. 40 - If you were to plant a de-etiolated (det2) mutant...Ch. 40 - Prob. 3ACh. 40 - Which of the following defects would prevent...
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- Which of these is a feature not present in seedless plants that have contributed to the success of seed plants on land? a. Seeds have four layers of protective tissue, the seed coat, that improve survival by providing more protection from environmental stresses. b. The reduced gametophytes of seed plants are nurtured by sporophytes and protected from stress, such as drought conditions and UV radiation. c. Seed germination is solely mediated by water during episodes of heavy rain. d. Pollen grains, with walls containing sporopollenin, deter herbivores. Three unknown non-vascular plant species were collected by Biology 3 students. Which characters BEST discriminate them from one another? 1. protonema II. special organelles III. seta IV. calyptra V. capsule VI. stalk a. I,II,III b. I,III,V c. III, IV, V d. II,IV,VIarrow_forwardIn a flower after fertilization, the following tissues are diploid: a. carpel, integuments, and megaspore mother cell. b. carpel, integuments, and megaspore. c. carpel, megaspore, and zygote. d. carpel, megaspore mother cell, and endosperm.arrow_forwardPresence of all of the following factors promotes dormancy of seeds, except a.Phenolics b.Impermeable seed coat c.Immature embryo d.Gibberellinsarrow_forward
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