Question 1

Somatic hybrids can be formed from:

Accepted Answer

A)  egg and sperm nuclei. 
B)  egg and polar nuclei. 
C)  2 parenchyma cells from different plants. 
D)  2 parenchyma cells from the same plant. 
E)  none of these answers are correct. 
A)  egg and sperm nuclei. 
B)  egg and polar nuclei. 
C)  2 parenchyma cells from different plants. 
D)  2 parenchyma cells from the same plant. 
E)  none of these answers are correct. C

Question 2

High-yielding crops produced during the green revolution require less water and fertilizer than previously produced crops.

Accepted Answer

A) True 
 B)False  False

Question 3

Grafting techniques are of relatively recent origin, being first practiced in the 1800's.

Accepted Answer

A) True 
 B)False  False

Question 4

Circular extrachromosomal pieces of DNA in bacteria are called

Accepted Answer

A)  prions. 
B)  plasmids. 
C)  capsids. 
D)  chromosomes. 
E)  both [prions and capsids] are correct. 
A)  prions. 
B)  plasmids. 
C)  capsids. 
D)  chromosomes. 
E)  both [prions and capsids] are correct.

Question 5

The first domesticated crop plants were:

Accepted Answer

A)  cereal grains. 
B)  potato. 
C)  banana. 
D)  tomato. 
E)  apple. 
A)  cereal grains. 
B)  potato. 
C)  banana. 
D)  tomato. 
E)  apple.

Question 6

Polyploidy is when flowering plants have more than two sets of chromosomes.

Accepted Answer

A) True 
 B)False

Question 7

A plasmid is a small circular DNA fragment.

Accepted Answer

A) True 
 B)False

Question 8

Development of homozygous purebred strains is brought about by

Accepted Answer

A)  cross-pollinating individuals of the same species or variety. 
B)  artificially inducing the doubling of chromosome numbers. 
C)  repeated inbreeding. 
D)  crossing heterozygous varieties with one another. 
E)  all of these answers are correct. 
A)  cross-pollinating individuals of the same species or variety. 
B)  artificially inducing the doubling of chromosome numbers. 
C)  repeated inbreeding. 
D)  crossing heterozygous varieties with one another. 
E)  all of these answers are correct.

Question 9

When people 'domesticate' plants, we ___________________.

Accepted Answer

A)  harvest them from wild populations 
B)  plant them in greenhouses 
C)  tame them 
D)  alter them genetically to meet our needs 
E)  claim the land where populations are found and let them continue to grow there 
A)  harvest them from wild populations 
B)  plant them in greenhouses 
C)  tame them 
D)  alter them genetically to meet our needs 
E)  claim the land where populations are found and let them continue to grow there

Question 10

A plant resulting from the fusion of two protoplasts from different species is called a somatic hybrid.

Accepted Answer

A) True 
 B)False

Question 11

Many crops, such as wheat, rice and beans, are ___________________ and do not require a pollinating agent such as wind or animals.

Accepted Answer

A)  cross-pollinating 
B)  outcrossing 
C)  open pollinated 
D)  not dependent on fertilization to produce fruits and seeds 
E)  self-pollinating 
A)  cross-pollinating 
B)  outcrossing 
C)  open pollinated 
D)  not dependent on fertilization to produce fruits and seeds 
E)  self-pollinating

Question 12

One advantage of genetic engineering over traditional plant breeding is the introduction of genes from very distantly related organisms.

Accepted Answer

A) True 
 B)False

Question 13

Methods for improving existing varieties of crop plants do NOT include __________.

Accepted Answer

A)  use of mutant forms 
B)  hybridization 
C)  use of polyploids 
D)  pruning 
E)  tissue culture 
A)  use of mutant forms 
B)  hybridization 
C)  use of polyploids 
D)  pruning 
E)  tissue culture

Question 14

It is of no particular importance which end of a cutting is inserted in the ground.

Accepted Answer

A) True 
 B)False

Question 15

Methods to insert desirable genes into a target cell in the production of a transgenic plant includes the use a crown gall bacterium or ______________.

Accepted Answer

A)  explant 
B)  producing a somatic hybrid cell 
C)  using a particle gun that fires very small DNA-covered gold pellets into the target cell 
D)  cross pollination 
E)  grafting 
A)  explant 
B)  producing a somatic hybrid cell 
C)  using a particle gun that fires very small DNA-covered gold pellets into the target cell 
D)  cross pollination 
E)  grafting

Question 16

A heirloom variety has undergone inbreeding to create a genetically uniform variety.

Accepted Answer

A) True 
 B)False

Question 17

Seeds to be sold for planting must produce vigorous and uniform plants.To insure their seeds meet these standards, commercial seed growers do all of the following EXCEPT

Accepted Answer

A)  Plants used for commercial seed production are isolated from fields of similar crops to prevent cross breeding. 
B)  Prior to planting, seeds may be dusted with fungicide to insure seedlings become established. 
C)  Soil moisture is monitored and the fields irrigated when needed. 
D)  Soil or the seeds to be planted may be augmented with beneficial soil bacteria to insure good plant nutrition. 
E)  Harvesting of seeds for commercial purposes are done at the same time and with the same equipment used for to harvest non-commercial crops. 
A)  Plants used for commercial seed production are isolated from fields of similar crops to prevent cross breeding. 
B)  Prior to planting, seeds may be dusted with fungicide to insure seedlings become established. 
C)  Soil moisture is monitored and the fields irrigated when needed. 
D)  Soil or the seeds to be planted may be augmented with beneficial soil bacteria to insure good plant nutrition. 
E)  Harvesting of seeds for commercial purposes are done at the same time and with the same equipment used for to harvest non-commercial crops.

Question 18

Tissue culture is used _______________.

Accepted Answer

A)  to rapidly increase the number of orchids for commercial sale 
B)  to culture protoplasts and propagate somatic hybrids 
C)  to grow plants from transgenic experiments 
D)  to propagate desirable somatic mutants such as naval oranges or seedless grapes 
E)  all of these 
A)  to rapidly increase the number of orchids for commercial sale 
B)  to culture protoplasts and propagate somatic hybrids 
C)  to grow plants from transgenic experiments 
D)  to propagate desirable somatic mutants such as naval oranges or seedless grapes 
E)  all of these

Question 19

One of the first changes in domesticated plants was probably __________________.

Accepted Answer

A)  increased requirement for fertilizer 
B)  geographic distriubution 
C)  loss of seed dispersal by wind, water, or animals 
D)  flower color 
E)  decrease in size, number of seeds or fruits, and nutritional quality 
A)  increased requirement for fertilizer 
B)  geographic distriubution 
C)  loss of seed dispersal by wind, water, or animals 
D)  flower color 
E)  decrease in size, number of seeds or fruits, and nutritional quality

Question 20

Genetic engineering involves the construction of new apical meristems.

Accepted Answer

A) True 
 B)False

Exam 14: Plant Breeding and Propagation

Somatic hybrids can be formed from:

High-yielding crops produced during the green revolution require less water and fertilizer than previously produced crops.

Grafting techniques are of relatively recent origin, being first practiced in the 1800's.

Circular extrachromosomal pieces of DNA in bacteria are called

The first domesticated crop plants were:

Polyploidy is when flowering plants have more than two sets of chromosomes.

A plasmid is a small circular DNA fragment.

Development of homozygous purebred strains is brought about by

When people 'domesticate' plants, we ___________________.

A plant resulting from the fusion of two protoplasts from different species is called a somatic hybrid.

Many crops, such as wheat, rice and beans, are ___________________ and do not require a pollinating agent such as wind or animals.

One advantage of genetic engineering over traditional plant breeding is the introduction of genes from very distantly related organisms.

Methods for improving existing varieties of crop plants do NOT include __________.

It is of no particular importance which end of a cutting is inserted in the ground.

Methods to insert desirable genes into a target cell in the production of a transgenic plant includes the use a crown gall bacterium or ______________.

A heirloom variety has undergone inbreeding to create a genetically uniform variety.

Seeds to be sold for planting must produce vigorous and uniform plants.To insure their seeds meet these standards, commercial seed growers do all of the following EXCEPT

Tissue culture is used _______________.

One of the first changes in domesticated plants was probably __________________.

Genetic engineering involves the construction of new apical meristems.

What Is Plant Biology

The Nature of Life

Cells

Tissues

Roots and Soils

Stems

Leaves

Flowers, Fruits, and Seeds

Water in Plants

Plant Metabolism

Growth

Meiosis and Alternation of Generation

Genetics

Evolution

Plant Names and Classification

Domain Kingdombacteria, Domain King-Domarchaea, and Viruses

Kingdom Protista

Kingdom Fungi

Introduction to the Plant Kingdom: Bryophytes

The Seedless Vascular Plants: Ferns and Their Relatives

Introduction to Seed Plants: Gymnosperms

Seed Plants: Angiosperms

Flowering Plants and Civilization

Ecology

Biomes

Filters