BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 39, Problem 1U
Which of the following is stimulated by blue light?
a. Seed germination
b. Detection of plant spacing
c. Phototropism
d. Shoot elongation
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Chapter 39 Solutions
BIOLOGY
Ch. 39.1 - Compare the pigments phytochrome and chlorophyll.Ch. 39.1 - List growth responses influenced by phytochrome.Ch. 39.1 - Prob. 3LOCh. 39.2 - Prob. 1LOCh. 39.2 - Prob. 2LOCh. 39.3 - Prob. 1LOCh. 39.3 - Prob. 2LOCh. 39.3 - Prob. 3LOCh. 39.4 - Prob. 1LOCh. 39.4 - Prob. 2LO
Ch. 39.4 - Identify the types of biological molecules that...Ch. 39.5 - Discuss properties of hormones.Ch. 39.5 - Prob. 2LOCh. 39.5 - Prob. 3LOCh. 39 - Prob. 1DACh. 39 - Prob. 1IQCh. 39 - Prob. 2IQCh. 39 - Propose a mechanism to explain how seedlings could...Ch. 39 - Which of the following is stimulated by blue...Ch. 39 - Prob. 2UCh. 39 - Prob. 3UCh. 39 - Prob. 4UCh. 39 - Which of the following does NOT happen as a seed...Ch. 39 - Dwarf mutants can sometimes be induced to grow...Ch. 39 - Prob. 1ACh. 39 - If you were to plant a de-etiolated (det2) mutant...Ch. 39 - Prob. 3ACh. 39 - Which of the following defects would prevent...Ch. 39 - You have come up with a brilliant idea to stretch...Ch. 39 - You have identified a mutant Arabtdopsis plant...Ch. 39 - Which of the following might not be observed in a...Ch. 39 - Prob. 1SCh. 39 - Prob. 2SCh. 39 - The current model for gravitropism suggests that...Ch. 39 - Prob. 4S
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- The arrival of pollen grains on a receptive stigma is called_____ . a. germination c. pollination b. fertilization d. propagationarrow_forwardIf a long-day plant has a critical night length of 9 hours, which 24-hour cycle would prevent flowering? (A) 16 hours light/8 hours dark (B) 14 hours light/10 hours dark (C) 4 hours light/8 hours dark/4 hours light/8 hours dark (D) 8 hours light/8 hours dark/light flash/8 hours darkarrow_forwardWhich 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 germinationarrow_forward
- Which of the following is false about the phytochrome protein?a. There are two convertible forms.b. It primarly absorbes blue wavelengths of light.c. It is involved in seed germination.d. It is involved in plant sensing of spacing.arrow_forwardIf you exposed seeds to a series of red light versus far-red light treatments, which of the following exposure treatments would result in seed germination? a. Red; far-red b. Far-red; red c. Red; far-red; red; far-red; red; far-red; red; far-red d. Both a and c are correct.arrow_forwardElevated levels of this hormone promote seed dormancy? Select one: a. gibberellin b. abscisic acid c. ethylene d. salicyclic acid e. auxinarrow_forward
- Flower shape and color can be linked to the process ofa. pollination.b. photosynthesis.c. germination.d. secondary growtharrow_forwardA seedling germinating under a stone grows at an angle away from the stone and upward. This response to touch is called ________. a. gravitropism b. thigmonasty c. thigmotropism d. skototropismarrow_forwardThe transfer of pollen grains from anther to stigma is (a) fertilization(b) double fertilization (c) pollination (d) germination (e) apomixisarrow_forward
- Phytochrome is a plant pigment protein that: a. mediates plant infection b. promotes plant growth c. mediates morphological changes in response to red and far-red light d. inhibits plant growtharrow_forwardHow to extract fruit seeds from small seeds with adhering flesh? a. wash them thoroughly with water b. simply twist the nut to separate from the pseudocarp c. remove the flesh by macerating seeds with fine sand, then wash thoroughly with water d. soak them in water for 24 hrs until the adhering materials becomes soft and readily separated from the seeds. Wash with tap water.arrow_forwardPlant development is influenced by: A. quality of light only B. quality and quantity of light C. quality and duration of light D. quality, quantity and duration of lightarrow_forward
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