Question 1

Abscission of fruits and leaves is controlled by

Accepted Answer

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

Question 2

In phototropism,shoots respond to ___ light.

Accepted Answer

A)  red 
B)  green 
C)  yellow 
D)  blue 
E)  ultra-violet 
A)  red 
B)  green 
C)  yellow 
D)  blue 
E)  ultra-violet D

Question 3

Four of the five answers listed below are characteristics of ethylene.Select the EXCEPTION.

Accepted Answer

A)  a source is aging plant tissues 
B)  promotes fruit ripening 
C)  triggers cells division 
D)  is a gas 
E)  inhibits cell elongation 
A)  a source is aging plant tissues 
B)  promotes fruit ripening 
C)  triggers cells division 
D)  is a gas 
E)  inhibits cell elongation E

Question 4

A stem on its side will turn up because

Accepted Answer

A)  cells elongate on the down side. 
B)  of gravitropism. 
C)  statoliths sink to the gravity side of the stem. 
D)  of the activity of auxin. 
E)  of all of these. 
A)  cells elongate on the down side. 
B)  of gravitropism. 
C)  statoliths sink to the gravity side of the stem. 
D)  of the activity of auxin. 
E)  of all of these.

Question 5

Approximately,what percent of flowering plants have animal pollinators?

Accepted Answer

A)  50 
B)  60 
C)  70 
D)  80 
E)  90 
A)  50 
B)  60 
C)  70 
D)  80 
E)  90

Question 6

In the flowering plant life cycle,into what strucures do microspores directly develop?

Accepted Answer

A)  male gametophytes 
B)  megaspores 
C)  sperm 
D)  zygotes 
E)  male sporophytes 
A)  male gametophytes 
B)  megaspores 
C)  sperm 
D)  zygotes 
E)  male sporophytes

Question 7

For flowers,which of the following is NOT a possible combination?

Accepted Answer

A)  complete and perfect 
B)  complete and imperfect 
C)  incomplete and perfect 
D)  incomplete and imperfect 
E)  more than one of these is NOT a possible combination 
A)  complete and perfect 
B)  complete and imperfect 
C)  incomplete and perfect 
D)  incomplete and imperfect 
E)  more than one of these is NOT a possible combination

Question 8

Why are apple trees propagated asexually?

Accepted Answer

A)  the process is much easier than growing them from seeds 
B)  it is the only way to grow the same reliable quality of apple 
C)  asexual propagation introduces genetic variation that makes the trees hardier 
D)  asexually propagated apple trees are more disease resistant 
E)  more than one of these is the reason why apple trees are asexually propagated 
A)  the process is much easier than growing them from seeds 
B)  it is the only way to grow the same reliable quality of apple 
C)  asexual propagation introduces genetic variation that makes the trees hardier 
D)  asexually propagated apple trees are more disease resistant 
E)  more than one of these is the reason why apple trees are asexually propagated

Question 9

Regarding seedless fruits,which of the following is paired incorrectly?

Accepted Answer

A)  seedless grapes--embryos abort 
B)  bananas--natural triploid sterility 
C)  seedless watermelons--induced triploid sterility 
D)  navel oranges--sprouted from corms 
E)  all of these are paired correctly 
A)  seedless grapes--embryos abort 
B)  bananas--natural triploid sterility 
C)  seedless watermelons--induced triploid sterility 
D)  navel oranges--sprouted from corms 
E)  all of these are paired correctly

Question 10

Apical dominance is controlled by

Accepted Answer

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

Question 11

-The ovary,which will develop into fruit,is at letter _____.

Accepted Answer

The answer of  
-The ovary,which will develop into fruit,is...

Question 12

What is the fate of the two-celled pollen that germinates on a receptive stigma?

Accepted Answer

A)  one cell becomes a pollen tube; the other cell becomes two sperm cells 
B)  one cell becomes a pollen tube; the other cell becomes a single sperm cell 
C)  one cell dies and the other becomes a sperm cell 
D)  both cells undergo mitosis to form four sperm cells 
E)  both cells become sperm cells 
A)  one cell becomes a pollen tube; the other cell becomes two sperm cells 
B)  one cell becomes a pollen tube; the other cell becomes a single sperm cell 
C)  one cell dies and the other becomes a sperm cell 
D)  both cells undergo mitosis to form four sperm cells 
E)  both cells become sperm cells

Question 13

What is the first step in seed germination?

Accepted Answer

A)  emergence of the embryonic root 
B)  diffusion of water into the seed 
C)  hydrolysis of starch 
D)  meristem cells divide rapidly 
E)  cotyledons emerge from the seed 
A)  emergence of the embryonic root 
B)  diffusion of water into the seed 
C)  hydrolysis of starch 
D)  meristem cells divide rapidly 
E)  cotyledons emerge from the seed

Question 14

In a phototropism,auxin moves to the ___ side of the stem and causes cell ___.

Accepted Answer

A)  shade--elongation 
B)  sun--elongation 
C)  sun--division 
D)  shade--division 
E)  shade--apotosis 
A)  shade--elongation 
B)  sun--elongation 
C)  sun--division 
D)  shade--division 
E)  shade--apotosis

Question 15

Four of the five answers listed below are useful to flowers as means of attracting vectors.Select the EXCEPTION.

Accepted Answer

A)  nectar 
B)  flower color 
C)  color patterns 
D)  pollen 
E)  wind 
A)  nectar 
B)  flower color 
C)  color patterns 
D)  pollen 
E)  wind

Question 16

Which of the following is a reason to graft plants?

Accepted Answer

A)  to maintain the quality of a plant 
B)  to increase the hardiness of a plant 
C)  to avoid plant diseases 
D)  to produce seedless fruits 
E)  all of these are reasons to graft plants 
A)  to maintain the quality of a plant 
B)  to increase the hardiness of a plant 
C)  to avoid plant diseases 
D)  to produce seedless fruits 
E)  all of these are reasons to graft plants

Question 17

____ refers to the phase from full maturity until the eventual death of plant parts or the whole plant.

Accepted Answer

A)  Dormancy 
B)  Photoperiodism 
C)  Abscission 
D)  Senescence 
E)  None of these 
A)  Dormancy 
B)  Photoperiodism 
C)  Abscission 
D)  Senescence 
E)  None of these

Question 18

-Pollen is produced in the structure at letter _____.

Accepted Answer

The answer of  
-Pollen is produced in the structure...

Question 19

Choose the one most appropriate answer for each.
a.haploid cells in the anther
b.reduction of chromosome number by one-half
c.after fertilization,ripens into fruit tissue
d.two nuclei in the ovule that unite with a single sperm
e.after fertilization,will form a seed
f.modified leaf with pigments and fragrance-producing cells
g.mature microspore
h.female reproductive organ
i.landing platform for pollen
j.pollen-bearing structure
k.haploid cells in the ovule
l.outermost whorl of flower parts on a receptacle
m.female gametophyte
-anther

Accepted Answer

The answer of Choose the one most appropriate answer for...

Question 20

The various flower parts are attached to the

Accepted Answer

A)  style. 
B)  receptacle. 
C)  stigma. 
D)  filament. 
E)  calyx. 
A)  style. 
B)  receptacle. 
C)  stigma. 
D)  filament. 
E)  calyx.

Exam 28: Plant Reproduction and Development

Abscission of fruits and leaves is controlled by

In phototropism,shoots respond to ___ light.

Four of the five answers listed below are characteristics of ethylene.Select the EXCEPTION.

A stem on its side will turn up because

Approximately,what percent of flowering plants have animal pollinators?

In the flowering plant life cycle,into what strucures do microspores directly develop?

For flowers,which of the following is NOT a possible combination?

Why are apple trees propagated asexually?

Regarding seedless fruits,which of the following is paired incorrectly?

Apical dominance is controlled by

-The ovary,which will develop into fruit,is at letter _____.

What is the fate of the two-celled pollen that germinates on a receptive stigma?

What is the first step in seed germination?

In a phototropism,auxin moves to the ___ side of the stem and causes cell ___.

Four of the five answers listed below are useful to flowers as means of attracting vectors.Select the EXCEPTION.

Which of the following is a reason to graft plants?

____ refers to the phase from full maturity until the eventual death of plant parts or the whole plant.

-Pollen is produced in the structure at letter _____.

The various flower parts are attached to the

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

DNA Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Filters

In a phototropism,auxin moves to the _ side of the stem and causes cell _.