Question 1

Which of the following is false regarding plant hormones?

Accepted Answer

A) They are signaling molecules that travel to target cells. 
B) They stimulate or inhibit gene activity. 
C) They bind to receptors on their target cells. 
D) Target cells are always adjacent to the secreting cell. 
E) All of these are false. 
A) They are signaling molecules that travel to target cells. 
B) They stimulate or inhibit gene activity. 
C) They bind to receptors on their target cells. 
D) Target cells are always adjacent to the secreting cell. 
E) All of these are false. D

Question 2

Plant growth and development is guided by

Accepted Answer

A) hormones. 
B) other signaling molecules. 
C) water availability. 
D) day length. 
E) all of these. 
A) hormones. 
B) other signaling molecules. 
C) water availability. 
D) day length. 
E) all of these. E

Question 3

Use the figure above to answer questions 
  
-The function of "A" is to

Accepted Answer

A) digest the endosperm. 
B) protect new leaves as the seedling grows through soil. 
C) secrete hormones that cause flowering. 
D) absorb pheromones secreted by other seedlings. 
E) do none of these. 
A) digest the endosperm. 
B) protect new leaves as the seedling grows through soil. 
C) secrete hormones that cause flowering. 
D) absorb pheromones secreted by other seedlings. 
E) do none of these. B

Question 4

What hormone(s) can be used commercially to prolong the shelf life of cut flowers?

Accepted Answer

A) abscisic acid 
B) cytokinins 
C) auxins 
D) ABA 
E) ethylene 
A) abscisic acid 
B) cytokinins 
C) auxins 
D) ABA 
E) ethylene

Question 5

Compared with young trees growing out in the open, young trees growing in a darker forest understory tend to have longer, thinner trunks with less branching.This developmental pattern is principally caused by

Accepted Answer

A) phototropism. 
B) thigmotropism. 
C) activated phytochrome being converted to inactive phytochrome. 
D) inactive phytochrome being converted to active phytochrome. 
E) none of these. 
A) phototropism. 
B) thigmotropism. 
C) activated phytochrome being converted to inactive phytochrome. 
D) inactive phytochrome being converted to active phytochrome. 
E) none of these.

Question 6

Use the above figure to answer questions 
  
-The letter "A" in the above figure represents

Accepted Answer

A) the root nodules. 
B) the primary root. 
C) the primary leaf. 
D) the cotyledons. 
E) none of these. 
A) the root nodules. 
B) the primary root. 
C) the primary leaf. 
D) the cotyledons. 
E) none of these.

Question 7

Use the above figure to answer questions 
  
-The letter "B" in the above figure represents

Accepted Answer

A) the root nodules. 
B) the primary root. 
C) the primary leaf. 
D) the cotyledons. 
E) none of these. 
A) the root nodules. 
B) the primary root. 
C) the primary leaf. 
D) the cotyledons. 
E) none of these.

Question 8

The plant hormone that promotes cell division in roots and shoots 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 9

The aging of a plant is

Accepted Answer

A) senescence. 
B) vernalization. 
C) abscission. 
D) dormancy. 
E) chlorosis. 
A) senescence. 
B) vernalization. 
C) abscission. 
D) dormancy. 
E) chlorosis.

Question 10

Rhythms that are repeated every 24 hours are

Accepted Answer

A) sleep movements. 
B) tropisms. 
C) physiological requirements. 
D) circadian rhythms. 
E) biological clocks. 
A) sleep movements. 
B) tropisms. 
C) physiological requirements. 
D) circadian rhythms. 
E) biological clocks.

Question 11

Which factor has NOT been implicated in breaking dormancy?

Accepted Answer

A) cytokinin movement from leaves to buds in late summer 
B) action of abscisic acid in the spring 
C) gibberellin accumulation in buds in late autumn and winter 
D) an exposure to low temperatures for hundreds of hours 
E) all of these 
A) cytokinin movement from leaves to buds in late summer 
B) action of abscisic acid in the spring 
C) gibberellin accumulation in buds in late autumn and winter 
D) an exposure to low temperatures for hundreds of hours 
E) all of these

Question 12

Growth refers to an increase in the __________ of cells.

Accepted Answer

A) size 
B) number 
C) differentiation 
D) volume 
E) all EXCEPT "differentiation" 
A) size 
B) number 
C) differentiation 
D) volume 
E) all EXCEPT "differentiation"

Question 13

The primary root of a seedling grows down

Accepted Answer

A) to avoid light. 
B) in response to gravity. 
C) because the cells on the upper surface of the root elongate more rapidly than those on the lower surface of the root. 
D) in response to different concentrations of auxin. 
E) because of all of these except "to avoid light." 
A) to avoid light. 
B) in response to gravity. 
C) because the cells on the upper surface of the root elongate more rapidly than those on the lower surface of the root. 
D) in response to different concentrations of auxin. 
E) because of all of these except "to avoid light."

Question 14

Use the above figure to answer questions 
  
-The letter "C" in the above figure represents

Accepted Answer

A) the root nodules. 
B) the primary root. 
C) the primary leaf. 
D) the cotyledons. 
E) none of these. 
A) the root nodules. 
B) the primary root. 
C) the primary leaf. 
D) the cotyledons. 
E) none of these.

Question 15

All EXCEPT which of the following has an effect on seed germination?

Accepted Answer

A) moisture 
B) temperature 
C) carbon dioxide 
D) number of daylight hours 
E) oxygen 
A) moisture 
B) temperature 
C) carbon dioxide 
D) number of daylight hours 
E) oxygen

Question 16

2,4-D, a potent eudicot weed killer, is most likely a synthetic

Accepted Answer

A) auxin. 
B) gibberellin. 
C) cytokinin. 
D) phytochrome. 
E) none of these. 
A) auxin. 
B) gibberellin. 
C) cytokinin. 
D) phytochrome. 
E) none of these.

Question 17

Auxin concentration gradients

Accepted Answer

A) appear once germination begins. 
B) cause regional differences in gene transcription. 
C) allow formation of plant parts in expected patterns. 
D) help young cells elongate so that shoots and roots lengthen. 
E) are described by all EXCEPT "appear once germination begins." 
A) appear once germination begins. 
B) cause regional differences in gene transcription. 
C) allow formation of plant parts in expected patterns. 
D) help young cells elongate so that shoots and roots lengthen. 
E) are described by all EXCEPT "appear once germination begins."

Question 18

The plant movement in the above figure is caused by

Accepted Answer

A) auxin differences in two sides of the coleoptile. 
B) gibberellin released in one side of the leaf. 
C) abscisic acid in two sides of the stems. 
D) salicylic acid in two sides of the roots. 
E) none of these. 
A) auxin differences in two sides of the coleoptile. 
B) gibberellin released in one side of the leaf. 
C) abscisic acid in two sides of the stems. 
D) salicylic acid in two sides of the roots. 
E) none of these.

Question 19

Use the above figure to answer questions 
  
-The letter "D" in the above figure represents

Accepted Answer

A) the root nodules. 
B) the primary root. 
C) the primary leaf. 
D) the cotyledons. 
E) none of these. 
A) the root nodules. 
B) the primary root. 
C) the primary leaf. 
D) the cotyledons. 
E) none of these.

Question 20

Chemicals produced by one group of cells that affect other target cells are called

Accepted Answer

A) secretions. 
B) signaling molecules. 
C) steroids. 
D) polymers. 
E) enzymes. 
A) secretions. 
B) signaling molecules. 
C) steroids. 
D) polymers. 
E) enzymes.

Exam 31: Plant Growth and Development

Which of the following is false regarding plant hormones?

Plant growth and development is guided by

Use the figure above to answer questions -The function of "A" is to

What hormone(s) can be used commercially to prolong the shelf life of cut flowers?

Compared with young trees growing out in the open, young trees growing in a darker forest understory tend to have longer, thinner trunks with less branching.This developmental pattern is principally caused by

Use the above figure to answer questions -The letter "A" in the above figure represents

Use the above figure to answer questions -The letter "B" in the above figure represents

The plant hormone that promotes cell division in roots and shoots is

The aging of a plant is

Rhythms that are repeated every 24 hours are

Which factor has NOT been implicated in breaking dormancy?

Growth refers to an increase in the __________ of cells.

The primary root of a seedling grows down

Use the above figure to answer questions -The letter "C" in the above figure represents

All EXCEPT which of the following has an effect on seed germination?

2,4-D, a potent eudicot weed killer, is most likely a synthetic

Auxin concentration gradients

The plant movement in the above figure is caused by

Use the above figure to answer questions -The letter "D" in the above figure represents

Chemicals produced by one group of cells that affect other target cells are called

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

Filters