Question 1

The hormone that enhances fruit ripening is:

Accepted Answer

A)  ethylene.
B)  gibberellic acid.
C)  abscisic acid.
D)  a cytokinin.
E)  auxin.F) D) and E)
G) C) and D)

Question 2

_____ in angiosperms occurs when a sperm cell "fertilizes" a diploid (2n) cell within the future seed (eventually forming a triploid (3n) endosperm), and a second sperm fertilizes a haploid (1n) egg.

Accepted Answer

Double fer...

Question 3

You are on an expedition into a tropical rainforest. You notice a tall plant with large, long, conical purple flowers that produce nectar. When you ask your guide about the plant, she pulls out a large pink fruit from her bag and explains that it is from the plant with the purple flowers. After tasting the fruit, you decide to bring the plant back home and cultivate it. You remember seeing a particular butterfly on the purple flowers during your trip to the rainforest. You decide that the pollinating butterflies are too costly and a potential danger to the ecosystem. Instead, you are going to genetically modify the plant so that it is a self-pollinating, self-compatible plant. What are some traits, both phenotypic and genotypic, that you would look for in the modified plants?

Accepted Answer

A)  The plants would have a mutated S gene.
B)  The anther and style would be in close proximity.
C)  The plants would be shorter.
D)  The plants could be pollinated by bees.E) A) and B)
F) A) and C)

Question 4

The first step in the evolution of the seed plant life cycle was likely:

Accepted Answer

A)  spores that could develop into either male or female gametophytes.
B)  dispersal of gametophytes instead of spores.
C)  the production of two types of spores in separate sporangia.
D)  bisexual gametophytes.E) B) and D)
F) A) and B)

Question 5

The complex mixture of polymers coating the spore that protects the spore from dessication and UV radiation is:

Accepted Answer

A)  sporopollenin.
B)  sporangium.
C)  endosperm.
D)  sporophyte.
E)  pollen.F) B) and E)
G) B) and D)

Question 6

Which of the following pairs contains an error?

Accepted Answer

A)  stigma: captures pollen
B)  anther: produces pollen
C)  ovary: contains and protects ovules
D)  style: produces ovules
E)  carpel: female portion of flowerF) C) and D)
G) A) and B)

Question 7

What was a major challenge that early land plants faced, and bryophytes still face, in adapting an ancestral aquatic reproductive cycle to land?

Accepted Answer

A)  Successful fertilization by free-swimming sperm is rare, because it generally requires continuous water films connecting male and female gametophytes.
B)  Few spores can survive dispersal in air.
C)  Plants dependent on surface water may have dried out and died before completing their life cycles.
D)  Gametophytes need environmental water to undergo meiosis.E) C) and D)
F) All of the above

Question 8

Based on morphology and developmental genetics, both carpels and stamens have been interpreted as modified leaves bearing reproductive organs. From this perspective, which of the following is an accurate description of a typical angiosperm flower?

Accepted Answer

A)  a leaf with sporangia that produce both male and female gametophytes
B)  a shoot that produces leaves with either male or female sporangia in an alternating pattern
C)  a shoot with a whorl of leaves bearing no reproductive structures, enclosing a whorl of leaves supporting sporangia from which sperm-bearing gametophytes emerge, enclosing a whorl of leaves supporting sporangia that contain egg-bearing gametophytes
D)  a shoot with a whorl of leaves bearing no reproductive structures, enclosing a whorl of leaves that contain egg-bearing gametophytes, enclosing a whorl of leaves supporting sporangia from which sperm-bearing gametophytes emergeE) C) and D)
F) B) and C)

Question 9

Many species of angiosperms are self-incompatible due to the presence of the _____-gene.

Accepted Answer

A)  S
B)  T
C)  G
D)  O
E)  DF) B) and C)
G) A) and C)

Question 10

Which of the following statements is true of the seeds of both gymnosperms and angiosperms?

Accepted Answer

A)  Seeds from both plants contain a triploid (3n) endosperm.
B)  Seeds from both plants contain a diploid (2n) embryo.
C)  Seeds from both plants contain a diploid (2n) seed coat.
D)  Seeds from both plants contain a haploid (1n) male gametophyte.E) A) and D)
F) A) and C)

Question 11

Which of the following structures is/are part of the carpel of a flower?

Accepted Answer

A)  ovary
B)  anther
C)  style
D)  stigma
E)  stamenF) All of the above
G) A) and B)

Question 12

When dandelions produce seeds by apomixis, which of the following is/are not involved?

Accepted Answer

A)  mitosis
B)  fertilization
C)  pollination
D)  haploid sporesE) A) and B)
F) All of the above

Question 13

One of the advantages that seeds have over spores is that they contain nutritional resources originating from photosynthesis by the maternal sporophyte that aid in establishment.

Accepted Answer

A) True 
 B)False

Question 14

In vascular plants, xylem and phloem are only present in the sporophyte generation.

Accepted Answer

A) True 
 B)False

Question 15

Diploid (2n) cells in the _____ of mosses, ferns, gymnosperms, and angiosperms divide meiotically and form haploid (1n) spores.

Accepted Answer

The answer of Diploid (2n) cells in the _____ of...

Question 16

The brightly colored whorl of flower parts that are specialized for attracting animal pollinators is composed of:

Accepted Answer

A)  petals.
B)  sepals.
C)  anthers.
D)  stamens.
E)  ovaries.F) B) and E)
G) A) and B)

Question 17

Which of the following structures constitute the stamen of a flower?

Accepted Answer

A)  stigma
B)  anther
C)  ovary
D)  style
E)  filamentF) A) and D)
G) B) and E)

Question 18

You smell a flower that is giving off a horrible smell of rotting meat. This flower is MOST likely pollinated by a:

Accepted Answer

A)  bird.
B)  bat.
C)  fly.
D)  rodent.
E)  bee.F) A) and B)
G) B) and D)

Question 19

Soybeans are a self-compatible species, in which the pollen matures and is released from the anthers even before the flower opens. As a result, most ovules are fertilized by pollen from the same flower. In animals, mating between closely related individuals results in a significant loss in vigor (in-breeding depression) . Why is this NOT a significant problem in plants?

Accepted Answer

A)  The dominant angiosperm generation is diploid, which prevents recessive genes from being expressed.
B)  Natural selection during the haploid gametophyte generation tends to eliminate recessive genes that have deleterious effects on the growth and development of the gametophyte.
C)  In seed plants, the sperm does not have to swim to reach the female gamete (egg) , but is instead carried there by the pollen tube.
D)  Double fertilization makes it impossible for the diploid offspring to be homozygous at any loci.E) A) and B)
F) A) and C)

Question 20

Which of the following types of plants do NOT demonstrate an "alternation of generations"?

Accepted Answer

A)  Chara and Choleochaete
B)  bryophytes
C)  lycophytes
D)  gymnosperms
E)  angiospermsF) A) and B)
G) A) and C)

Exam 30: Plant Reproduction: Finding Mates and Dispersing Young

What was a major challenge that early land plants faced, and bryophytes still face, in adapting an ancestral aquatic reproductive cycle to land?

Correct Answer
verified

You smell a flower that is giving off a horrible smell of rotting meat. This flower is MOST likely pollinated by a:

Correct Answer
verified

Diploid (2n) cells in the _____ of mosses, ferns, gymnosperms, and angiosperms divide meiotically and form haploid (1n) spores.

Correct Answer
verified

One of the advantages that seeds have over spores is that they contain nutritional resources originating from photosynthesis by the maternal sporophyte that aid in establishment.

Correct Answer
verified

Correct Answer
verified

Which of the following structures constitute the stamen of a flower?

Correct Answer
verified

Which of the following types of plants do NOT demonstrate an "alternation of generations"?

Correct Answer
verified

Which of the following pairs contains an error?

Correct Answer
verified

The first step in the evolution of the seed plant life cycle was likely:

Correct Answer
verified

The brightly colored whorl of flower parts that are specialized for attracting animal pollinators is composed of:

Correct Answer
verified

Which of the following structures is/are part of the carpel of a flower?

Correct Answer
verified

Correct Answer
verified

In vascular plants, xylem and phloem are only present in the sporophyte generation.

Correct Answer
verified

_____ in angiosperms occurs when a sperm cell "fertilizes" a diploid (2n) cell within the future seed (eventually forming a triploid (3n) endosperm), and a second sperm fertilizes a haploid (1n) egg.

Correct Answer
verified
Double fer...
View Answer

Which of the following statements is true of the seeds of both gymnosperms and angiosperms?

Correct Answer
verified

Based on morphology and developmental genetics, both carpels and stamens have been interpreted as modified leaves bearing reproductive organs. From this perspective, which of the following is an accurate description of a typical angiosperm flower?

Correct Answer
verified

The hormone that enhances fruit ripening is:

Correct Answer
verified

Many species of angiosperms are self-incompatible due to the presence of the _____-gene.

Correct Answer
verified

When dandelions produce seeds by apomixis, which of the following is/are not involved?

Correct Answer
verified

The complex mixture of polymers coating the spore that protects the spore from dessication and UV radiation is:

Correct Answer
verified

Exam 30: Plant Reproduction: Finding Mates and Dispersing Young

What was a major challenge that early land plants faced, and bryophytes still face, in adapting an ancestral aquatic reproductive cycle to land?

Correct AnswerverifiedShow Answer

You smell a flower that is giving off a horrible smell of rotting meat. This flower is MOST likely pollinated by a:

Correct AnswerverifiedShow Answer

Diploid (2n) cells in the _____ of mosses, ferns, gymnosperms, and angiosperms divide meiotically and form haploid (1n) spores.

Correct AnswerverifiedShow Answer

One of the advantages that seeds have over spores is that they contain nutritional resources originating from photosynthesis by the maternal sporophyte that aid in establishment.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following structures constitute the stamen of a flower?

Correct AnswerverifiedShow Answer

Which of the following types of plants do NOT demonstrate an "alternation of generations"?

Correct AnswerverifiedShow Answer

Which of the following pairs contains an error?

Correct AnswerverifiedShow Answer

The first step in the evolution of the seed plant life cycle was likely:

Correct AnswerverifiedShow Answer

The brightly colored whorl of flower parts that are specialized for attracting animal pollinators is composed of:

Correct AnswerverifiedShow Answer

Which of the following structures is/are part of the carpel of a flower?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In vascular plants, xylem and phloem are only present in the sporophyte generation.

Correct AnswerverifiedShow Answer

_____ in angiosperms occurs when a sperm cell "fertilizes" a diploid (2n) cell within the future seed (eventually forming a triploid (3n) endosperm), and a second sperm fertilizes a haploid (1n) egg.

Correct AnswerverifiedDouble fer...View AnswerShow Answer

Which of the following statements is true of the seeds of both gymnosperms and angiosperms?

Correct AnswerverifiedShow Answer

Based on morphology and developmental genetics, both carpels and stamens have been interpreted as modified leaves bearing reproductive organs. From this perspective, which of the following is an accurate description of a typical angiosperm flower?

Correct AnswerverifiedShow Answer

The hormone that enhances fruit ripening is:

Correct AnswerverifiedShow Answer

Many species of angiosperms are self-incompatible due to the presence of the _____-gene.

Correct AnswerverifiedShow Answer

When dandelions produce seeds by apomixis, which of the following is/are not involved?

Correct AnswerverifiedShow Answer

The complex mixture of polymers coating the spore that protects the spore from dessication and UV radiation is:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Double fer...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified