Question 1

Auxins are secreted by

Accepted Answer

A) most tissues undergoing ripening. 
B) apical meristems of shoots, coleoptiles, and roots. 
C) vascular tissues of stems and leaves. 
D) root caps. 
E) root cells in response to water stress. 
A) most tissues undergoing ripening. 
B) apical meristems of shoots, coleoptiles, and roots. 
C) vascular tissues of stems and leaves. 
D) root caps. 
E) root cells in response to water stress.

Question 2

The plant hormone that promotes fruit ripening is

Accepted Answer

A) auxin. 
B) gibberellin. 
C) cytokinin. 
D) abscisic acid. 
E) ethylene. 
A) auxin. 
B) gibberellin. 
C) cytokinin. 
D) abscisic acid. 
E) ethylene.

Question 3

For some seeds to germinate,

Accepted Answer

A) they must first be exposed to a critical low temperature for a certain length of time. 
B) they must be exposed to proper environmental conditions of temperature and moisture. 
C) something must remove the restrictive seed coat. 
D) something must remove the hormones that promote dormancy. 
E) all of these must occur. 
A) they must first be exposed to a critical low temperature for a certain length of time. 
B) they must be exposed to proper environmental conditions of temperature and moisture. 
C) something must remove the restrictive seed coat. 
D) something must remove the hormones that promote dormancy. 
E) all of these must occur.

Question 4

Which of the following statements is false?

Accepted Answer

A) Long-day plants bloom in the summer. 
B) Short-day plants bloom at noon. 
C) Short-day plants bloom in late summer and early fall. 
D) Chrysanthemums and cockleburs are short-day plants. 
E) Day-neutral plants flower when mature enough to do so. 
A) Long-day plants bloom in the summer. 
B) Short-day plants bloom at noon. 
C) Short-day plants bloom in late summer and early fall. 
D) Chrysanthemums and cockleburs are short-day plants. 
E) Day-neutral plants flower when mature enough to do so.

Question 5

Which plant hormone listed below is responsible for the symbiotic relationship shown in the above figure?

Accepted Answer

A) auxin 
B) gibberellin 
C) cytokinin 
D) jasmonates 
E) ethylene 
A) auxin 
B) gibberellin 
C) cytokinin 
D) jasmonates 
E) ethylene

Question 6

The requirement of cold weather before a particular plant process occurs (e.g., germination) is known as

Accepted Answer

A) the biological clock. 
B) vernalization. 
C) photoperiodism. 
D) biennial life cycle. 
E) biorhythm. 
A) the biological clock. 
B) vernalization. 
C) photoperiodism. 
D) biennial life cycle. 
E) biorhythm.

Question 7

Which is (are) the principal substance(s) that regulate(s) thigmotropism?

Accepted Answer

A) auxin and ethylene 
B) gibberellin 
C) abscisic acid 
D) salicylic acid 
E) none of these 
A) auxin and ethylene 
B) gibberellin 
C) abscisic acid 
D) salicylic acid 
E) none of these

Question 8

The pigment responsible for photoperiodism is

Accepted Answer

A) chlorophyll. 
B) xanthophyll. 
C) anthocyanin. 
D) phytochrome. 
E) phytoerythrin. 
A) chlorophyll. 
B) xanthophyll. 
C) anthocyanin. 
D) phytochrome. 
E) phytoerythrin.

Question 9

Synthetic auxins are used as

Accepted Answer

A) pesticides. 
B) herbicides. 
C) fungicides. 
D) insecticides. 
E) all of these. 
A) pesticides. 
B) herbicides. 
C) fungicides. 
D) insecticides. 
E) all of these.

Question 10

Dormancy can be triggered by

Accepted Answer

A) low Pfr levels. 
B) the production of abscisic acid. 
C) nitrogen deficiency and low soil moisture. 
D) cold nights. 
E) all of these. 
A) low Pfr levels. 
B) the production of abscisic acid. 
C) nitrogen deficiency and low soil moisture. 
D) cold nights. 
E) all of these.

Question 11

Plants cannot __________ in the dark.

Accepted Answer

A) grow 
B) respire 
C) move 
D) utilize chlorophyll 
E) sense light 
A) grow 
B) respire 
C) move 
D) utilize chlorophyll 
E) sense light

Question 12

Even though the autumn may be unusually warm, the leaves from deciduous trees begin to drop during September.Which of the following is the best explanation?

Accepted Answer

A) The trees are responding to shorter days. 
B) The autumn months are usually drier because the summer rains have tapered off. 
C) The effects of phototropism are operating "right on schedule." 
D) There is not enough sunlight to carry on photosynthesis any longer. 
E) None of these are the best explanation. 
A) The trees are responding to shorter days. 
B) The autumn months are usually drier because the summer rains have tapered off. 
C) The effects of phototropism are operating "right on schedule." 
D) There is not enough sunlight to carry on photosynthesis any longer. 
E) None of these are the best explanation.

Question 13

The active form of phytochrome is known as

Accepted Answer

A) Pp. 
B) Pr. 
C) Pfr. 
D) Pl. 
E) Pst. 
A) Pp. 
B) Pr. 
C) Pfr. 
D) Pl. 
E) Pst.

Question 14

Application of synthetic gibberellins improves the quality and marketability of

Accepted Answer

A) oranges. 
B) grapes. 
C) celery. 
D) cabbage. 
E) all of these. 
A) oranges. 
B) grapes. 
C) celery. 
D) cabbage. 
E) all of these.

Question 15

Use the above figure to answer questions 
  
-The letter __________ in the above figure represents the branch roots.

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) none of these 
A) A 
B) B 
C) C 
D) D 
E) none of these

Question 16

Abscission affects

Accepted Answer

A) leaves. 
B) fruits. 
C) flowers. 
D) all of these. 
E) none of these. 
A) leaves. 
B) fruits. 
C) flowers. 
D) all of these. 
E) none of these.

Question 17

Which of the following responses is NOT controlled by plant hormones?

Accepted Answer

A) the growth form of the plant (apical dominance) 
B) the beginning and ending of dormancy 
C) the bending of an oat coleoptile toward light 
D) the production of glucose by the chloroplast 
E) the formation of abscission zones 
A) the growth form of the plant (apical dominance) 
B) the beginning and ending of dormancy 
C) the bending of an oat coleoptile toward light 
D) the production of glucose by the chloroplast 
E) the formation of abscission zones

Exam 31: Plant Growth and Development

Auxins are secreted by

The plant hormone that promotes fruit ripening is

For some seeds to germinate,

Which of the following statements is false?

Which plant hormone listed below is responsible for the symbiotic relationship shown in the above figure?

The requirement of cold weather before a particular plant process occurs (e.g., germination) is known as

Which is (are) the principal substance(s) that regulate(s) thigmotropism?

The pigment responsible for photoperiodism is

Synthetic auxins are used as

Dormancy can be triggered by

Plants cannot __________ in the dark.

Even though the autumn may be unusually warm, the leaves from deciduous trees begin to drop during September.Which of the following is the best explanation?

The active form of phytochrome is known as

Application of synthetic gibberellins improves the quality and marketability of

Use the above figure to answer questions -The letter __________ in the above figure represents the branch roots.

Abscission affects

Which of the following responses is NOT controlled by plant hormones?

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

A Closer Look at Cell Membranes

Ground Rules of Metabolism

Where It Startsphotosynthesis

Energy-Releasing Pathways

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Dna Structure and Function

From Dna to Protein

Controls Over Genes

Recombinant Dna and Genetic Engineering

The Macroevolutionary Puzzle

Emergence of Evolutionary Thought

Organizing Information About Species

The Origin and Evolution of Life

Viruses and Prokaryotes

Protists the Simplest Eukaryotes

Plants

Fungi

Animals: the Invertebrates

Animal Evolution the Chordates

Human Evolution: a Case Study

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Protection, Support, and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Structure and Biodiversity

Ecosystems

The Biosphere

Human Impacts on the Biosphere

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