Question 1

The gametophyte of a flowering plant is

Accepted Answer

A)  a flower. 
B)  an egg. 
C)  a pollen grain. 
D)  an anther. 
E)  the entire plant. 
A)  a flower. 
B)  an egg. 
C)  a pollen grain. 
D)  an anther. 
E)  the entire plant.

Question 2

Use the following to answer questions :
Refer to the diagram below.  
-Name the cell from the microgametophyte that will form the sperm and identify its label.

Accepted Answer

The answer of Use the following to answer questions :
Refer...

Question 3

Which of the following does not participate in asexual reproduction?

Accepted Answer

A)  Stolon 
B)  Rhizome 
C)  Zygote 
D)  Tuber 
E)  Corm 
A)  Stolon 
B)  Rhizome 
C)  Zygote 
D)  Tuber 
E)  Corm

Question 4

Pollination is the

Accepted Answer

A)  fusion of the egg and sperm nuclei. 
B)  transfer of pollen from the anther to the stigma. 
C)  development of the two-celled pollen grain. 
D)  growth of the pollen tube after pollen germination. 
E)  division of the generative nucleus to produce two sperm nuclei. 
A)  fusion of the egg and sperm nuclei. 
B)  transfer of pollen from the anther to the stigma. 
C)  development of the two-celled pollen grain. 
D)  growth of the pollen tube after pollen germination. 
E)  division of the generative nucleus to produce two sperm nuclei.

Question 5

The ability of plants to measure night length was determined by experiments in which

Accepted Answer

A)  plants were grown in 12 hours of darkness alternating with 12 hours of light. 
B)  plants were grown in continuous light. 
C)  dark periods were interrupted with brief pulses of light. 
D)  flowering was measured in plants of different ages that had been placed on the same light-dark schedule. 
E)  plants were grown in a 24-hour cycle in which the length of the light period was increased gradually. 
A)  plants were grown in 12 hours of darkness alternating with 12 hours of light. 
B)  plants were grown in continuous light. 
C)  dark periods were interrupted with brief pulses of light. 
D)  flowering was measured in plants of different ages that had been placed on the same light-dark schedule. 
E)  plants were grown in a 24-hour cycle in which the length of the light period was increased gradually.

Question 6

In some eudicots, no distinct endosperm can be seen because the

Accepted Answer

A)  embryo has digested the endosperm. 
B)  cotyledons have absorbed the endosperm. 
C)  seeds never produced an endosperm. 
D)  endosperm has become the seed coat. 
E)  fruit has incorporated the endosperm. 
A)  embryo has digested the endosperm. 
B)  cotyledons have absorbed the endosperm. 
C)  seeds never produced an endosperm. 
D)  endosperm has become the seed coat. 
E)  fruit has incorporated the endosperm.

Question 7

You manage a greenhouse that produces roses for Valentine's Day. Roses normally bloom in June. Which of the following will most likely be the best lighting schedule for your roses?

Accepted Answer

A)  16 hours of light, followed by 8 hours of interrupted dark 
B)  16 hours of light, followed by 8 hours of uninterrupted dark 
C)  10 hours of light, followed by 14 hours of uninterrupted dark 
D)  10 hours of light, followed by 14 hours of interrupted dark 
E)  None of the above 
A)  16 hours of light, followed by 8 hours of interrupted dark 
B)  16 hours of light, followed by 8 hours of uninterrupted dark 
C)  10 hours of light, followed by 14 hours of uninterrupted dark 
D)  10 hours of light, followed by 14 hours of interrupted dark 
E)  None of the above

Question 8

The inability of plants to reproduce sexually using male and female parts of flowers from the same plant

Accepted Answer

A)  results from a barrier to pollination. 
B)  results in less genetic diversity in a species. 
C)  occurs in all plants. 
D)  is called self-incompatibility. 
E)  occurs because the pollen is not firmly bound to the stigma. 
A)  results from a barrier to pollination. 
B)  results in less genetic diversity in a species. 
C)  occurs in all plants. 
D)  is called self-incompatibility. 
E)  occurs because the pollen is not firmly bound to the stigma.

Question 9

Instead of germinating immediately after release, many seeds undergo an inactive period of _______.

Accepted Answer

The answer of Instead of germinating immediately after release, many...

Question 10

Self-pollination in plants that produce both pollen and eggs is prevented by

Accepted Answer

A)  self-incompatibility genes. 
B)  physical barriers. 
C)  production of pollen and eggs at different times. 
D)  All of the above 
E)  None of the above 
A)  self-incompatibility genes. 
B)  physical barriers. 
C)  production of pollen and eggs at different times. 
D)  All of the above 
E)  None of the above

Question 11

The loss of water from a developing seed causes it to

Accepted Answer

A)  produce a root. 
B)  die. 
C)  be released from the fruit. 
D)  become dormant. 
E)  be protected from animal predators. 
A)  produce a root. 
B)  die. 
C)  be released from the fruit. 
D)  become dormant. 
E)  be protected from animal predators.

Question 12

Early in development, _______ initiates cell specialization in the embryo.

Accepted Answer

A)  mitotic division of the zygote 
B)  uneven distribution of cytoplasm 
C)  absorption of food from the endosperm 
D)  seed germination 
E)  maturation of the fruit 
A)  mitotic division of the zygote 
B)  uneven distribution of cytoplasm 
C)  absorption of food from the endosperm 
D)  seed germination 
E)  maturation of the fruit

Question 13

During double fertilization two sperm cells fuse (one each) with

Accepted Answer

A)  an egg cell. 
B)  the two polar nuclei. 
C)  a pollen grain. 
D)  Both a and b 
E)  Both a and c 
A)  an egg cell. 
B)  the two polar nuclei. 
C)  a pollen grain. 
D)  Both a and b 
E)  Both a and c

Question 14

The suspensor

Accepted Answer

A)  gives rise to the embryo. 
B)  is heart-shaped in eudicots. 
C)  separates the two cotyledons of eudicots. 
D)  ceases to elongate early in embryonic development. 
E)  is larger than the embryo. 
A)  gives rise to the embryo. 
B)  is heart-shaped in eudicots. 
C)  separates the two cotyledons of eudicots. 
D)  ceases to elongate early in embryonic development. 
E)  is larger than the embryo.

Question 15

Winter wheat can be planted in the spring for fall harvest if it is

Accepted Answer

A)  sprayed with gibberellins. 
B)  soaked in water. 
C)  planted under a full moon. 
D)  stored in the dark for 50 days. 
E)  vernalized. 
A)  sprayed with gibberellins. 
B)  soaked in water. 
C)  planted under a full moon. 
D)  stored in the dark for 50 days. 
E)  vernalized.

Question 16

Which of the following treatments would cause cocklebur, a short day plant, to flower?

Accepted Answer

A)  16 hours of light; 7 hours of darkness 
B)  12 hours of light; 8 hours of darkness 
C)  12 hours of light; 10 hours of darkness 
D)  12 hours of light; 8 hours of darkness, but the plants are exposed to red light for 10 minutes in the middle of the dark period 
E)  12 hours of light; a 30 minute dark period in the middle of the light period; 8 hours of darkness 
A)  16 hours of light; 7 hours of darkness 
B)  12 hours of light; 8 hours of darkness 
C)  12 hours of light; 10 hours of darkness 
D)  12 hours of light; 8 hours of darkness, but the plants are exposed to red light for 10 minutes in the middle of the dark period 
E)  12 hours of light; a 30 minute dark period in the middle of the light period; 8 hours of darkness

Question 17

Which of the following is a characteristic of wind-dispersed seeds?

Accepted Answer

A)  Abundant pollen 
B)  Hooked extensions 
C)  Fleshy fruit 
D)  Air chambers 
E)  A "parachute" 
A)  Abundant pollen 
B)  Hooked extensions 
C)  Fleshy fruit 
D)  Air chambers 
E)  A "parachute"

Question 18

The endosperm is formed by a fusion between the _______ and _______.

Accepted Answer

A)  egg nucleus; the sperm nucleus 
B)  egg nucleus; two sperm nuclei 
C)  synergid nuclei; the sperm nucleus 
D)  polar nuclei; the generative nucleus 
E)  polar nuclei; the sperm nucleus 
A)  egg nucleus; the sperm nucleus 
B)  egg nucleus; two sperm nuclei 
C)  synergid nuclei; the sperm nucleus 
D)  polar nuclei; the generative nucleus 
E)  polar nuclei; the sperm nucleus

Question 19

A flower that is wind-pollinated would be least likely to

Accepted Answer

A)  have numerous anthers. 
B)  have sticky or feathery stigmas. 
C)  produce large numbers of pollen grains. 
D)  have a colorful corolla. 
E)  have unscented flowers. 
A)  have numerous anthers. 
B)  have sticky or feathery stigmas. 
C)  produce large numbers of pollen grains. 
D)  have a colorful corolla. 
E)  have unscented flowers.

Question 20

Pollination in angiosperms

Accepted Answer

A)  always requires wind. 
B)  never occurs within a single flower. 
C)  always requires help by animal pollinators. 
D)  is also called fertilization. 
E)  makes most angiosperms independent of external water for reproduction. 
A)  always requires wind. 
B)  never occurs within a single flower. 
C)  always requires help by animal pollinators. 
D)  is also called fertilization. 
E)  makes most angiosperms independent of external water for reproduction.

Exam 38: Reproduction in Flowering Plants

The gametophyte of a flowering plant is

Use the following to answer questions : Refer to the diagram below. -Name the cell from the microgametophyte that will form the sperm and identify its label.

Which of the following does not participate in asexual reproduction?

Pollination is the

The ability of plants to measure night length was determined by experiments in which

In some eudicots, no distinct endosperm can be seen because the

You manage a greenhouse that produces roses for Valentine's Day. Roses normally bloom in June. Which of the following will most likely be the best lighting schedule for your roses?

The inability of plants to reproduce sexually using male and female parts of flowers from the same plant

Instead of germinating immediately after release, many seeds undergo an inactive period of _______.

Self-pollination in plants that produce both pollen and eggs is prevented by

The loss of water from a developing seed causes it to

Early in development, _______ initiates cell specialization in the embryo.

During double fertilization two sperm cells fuse (one each) with

The suspensor

Winter wheat can be planted in the spring for fall harvest if it is

Which of the following treatments would cause cocklebur, a short day plant, to flower?

Which of the following is a characteristic of wind-dispersed seeds?

The endosperm is formed by a fusion between the _______ and _______.

A flower that is wind-pollinated would be least likely to

Pollination in angiosperms

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The endosperm is formed by a fusion between the _ and _.