Question 1

In flowering plants, mature male gametophytes consist of _______ cell(s), and mature female gametophytes consist of _______ cell(s).

Accepted Answer

A)  one; one 
B)  one; two 
C)  two; two 
D)  three; seven 
E)  three; eight 
A)  one; one 
B)  one; two 
C)  two; two 
D)  three; seven 
E)  three; eight

Question 2

Photoperiodism is most closely related to what daily rhythms of a plant's life?

Accepted Answer

A)  Water uptake and loss 
B)  Changes in herbivore pressure 
C)  Opening of stomata 
D)  Circadian rhythms 
E)  Photosynthetic rhythms 
A)  Water uptake and loss 
B)  Changes in herbivore pressure 
C)  Opening of stomata 
D)  Circadian rhythms 
E)  Photosynthetic rhythms

Question 3

If part of a photoperiodically induced plant is grafted to a noninduced plant, which is most likely to occur?

Accepted Answer

A)  Both plants will die. 
B)  Both plants will produce more roots. 
C)  Both plants will flower. 
D)  Only the induced plant will flower. 
E)  Only the noninduced plant will flower. 
A)  Both plants will die. 
B)  Both plants will produce more roots. 
C)  Both plants will flower. 
D)  Only the induced plant will flower. 
E)  Only the noninduced plant will flower.

Question 4

Which characteristic is a benefit of sexual reproduction in plants?

Accepted Answer

A)  The great number of progeny that result 
B)  Ease of pollination 
C)  The creation of new combinations of genes and diverse phenotypes 
D)  The creation of a diploid plant from a haploid plant 
E)  Greater dispersal of progeny 
A)  The great number of progeny that result 
B)  Ease of pollination 
C)  The creation of new combinations of genes and diverse phenotypes 
D)  The creation of a diploid plant from a haploid plant 
E)  Greater dispersal of progeny

Question 5

Even if a plant receives an inductive stimulus that would normally lead to flowering, the flowering may be prevented by immediate removal of the

Accepted Answer

A)  floral meristem. 
B)  vegetative apical meristem. 
C)  stems. 
D)  leaves. 
E)  roots. 
A)  floral meristem. 
B)  vegetative apical meristem. 
C)  stems. 
D)  leaves. 
E)  roots.

Question 6

A scientist has perfected a technique, using a microcapillary, for catching sperm as they leave the pollen tube.At which structure should the microcapillary be placed for studying the earliest steps in sperm release?

Accepted Answer

A)  The egg cell 
B)  The synergids 
C)  The integument 
D)  The antipodals 
E)  The central cell 
A)  The egg cell 
B)  The synergids 
C)  The integument 
D)  The antipodals 
E)  The central cell

Question 7

A newly grown lemon plant is placed next to the parent plant that produced the seed.The two plants prove identical, indicating it was an apomictic seed.What else can be said about this seed?

Accepted Answer

A)  It was produced when two sperm fertilized one egg. 
B)  It developed from one egg alone. 
C)  It was the result of parental self-fertilization. 
D)  It was homozygous for most genetic traits. 
E)  It formed without fertilization. 
A)  It was produced when two sperm fertilized one egg. 
B)  It developed from one egg alone. 
C)  It was the result of parental self-fertilization. 
D)  It was homozygous for most genetic traits. 
E)  It formed without fertilization.

Question 8

Which structure is not a modified stem?

Accepted Answer

A)  Rhizome 
B)  Runner 
C)  Tuber 
D)  Bulb 
E)  Root 
A)  Rhizome 
B)  Runner 
C)  Tuber 
D)  Bulb 
E)  Root

Question 9

Which statement about a genetically self-incompatible species of plant is false?

Accepted Answer

A)  It has many S alleles. 
B)  Its self pollen germinates poorly. 
C)  Its self pollen tubes grow poorly. 
D)  Its self pollen attaches poorly to pollinators. 
E)  Its recognition of self pollen involves proteins. 
A)  It has many S alleles. 
B)  Its self pollen germinates poorly. 
C)  Its self pollen tubes grow poorly. 
D)  Its self pollen attaches poorly to pollinators. 
E)  Its recognition of self pollen involves proteins.

Question 10

LEAFY is a _______ whose expression causes vegetative meristem cells to become reproductive, regardless of environmental cues.

Accepted Answer

meristem i

Question 11

Some orchids grow vegetatively and flower underground.However, since the biology of their gametophytes is typical for flowering plants, we can conclude that the male gametophyte

Accepted Answer

A)  germinates within the anther. 
B)  is the pollen grain. 
C)  attaches to the ovule prior to germination. 
D)  can germinate on its own to form new plants. 
E)  is the macrogametophyte. 
A)  germinates within the anther. 
B)  is the pollen grain. 
C)  attaches to the ovule prior to germination. 
D)  can germinate on its own to form new plants. 
E)  is the macrogametophyte.

Question 12

During fertilization in angiosperms, one sperm nucleus fuses with the nucleus of an egg to produce a _______ zygote, and the other sperm nucleus fuses with the polar nuclei to produce a _______ endosperm.

Accepted Answer

A)  diploid; diploid 
B)  diploid; triploid 
C)  triploid; triploid 
D)  triploid; tetraploid 
E)  diploid; tetraploid 
A)  diploid; diploid 
B)  diploid; triploid 
C)  triploid; triploid 
D)  triploid; tetraploid 
E)  diploid; tetraploid

Question 13

A horticulturalist who wants to induce flowering in a crop of short-day plants should carry out the induction

Accepted Answer

A)  in the spring. 
B)  when day length is below a critical maximum. 
C)  in midsummer. 
D)  when day length is above a critical maximum. 
E)  throughout the summer. 
A)  in the spring. 
B)  when day length is below a critical maximum. 
C)  in midsummer. 
D)  when day length is above a critical maximum. 
E)  throughout the summer.

Question 14

Which statement about plants produced from seed is generally true?

Accepted Answer

A)  They are genetically uniform throughout, unlike those produced by grafting. 
B)  They make fewer flowers than those produced by grafting. 
C)  They have more roots than those produced by grafting. 
D)  They make extra hormones more often than those produced by grafting. 
E)  They are smaller than vegetatively grown offspring. 
A)  They are genetically uniform throughout, unlike those produced by grafting. 
B)  They make fewer flowers than those produced by grafting. 
C)  They have more roots than those produced by grafting. 
D)  They make extra hormones more often than those produced by grafting. 
E)  They are smaller than vegetatively grown offspring.

Question 15

Which statement about fruits and fruit-bearing plants is false?

Accepted Answer

A)  Most developing fruits include an ovary and seeds. 
B)  Fruits help disperse seeds. 
C)  Organisms that disperse seeds can benefit from their relationship with plants. 
D)  Seeds of fruits eaten by animals cannot be viable. 
E)  Some plants produce dry seeds with attachments that help in wind dispersal. 
A)  Most developing fruits include an ovary and seeds. 
B)  Fruits help disperse seeds. 
C)  Organisms that disperse seeds can benefit from their relationship with plants. 
D)  Seeds of fruits eaten by animals cannot be viable. 
E)  Some plants produce dry seeds with attachments that help in wind dispersal.

Question 16

Suppose that a certain angiosperm grows both in Colorado and in New England.The Colorado plants reproduce asexually, while those in New England reproduce sexually.What can be inferred about the two environments in which these plants grow?

Accepted Answer

A)  Both environments are stable. 
B)  The Colorado specimens grow in a more stable environment. 
C)  The New England specimens grow in a more stable environment. 
D)  Neither environment is stable. 
E)  No hypothesis can be developed from this information. 
A)  Both environments are stable. 
B)  The Colorado specimens grow in a more stable environment. 
C)  The New England specimens grow in a more stable environment. 
D)  Neither environment is stable. 
E)  No hypothesis can be developed from this information.

Question 17

By strict definition, a berry is a fleshy fruit, without a stone, produced by a single flower with only one ovary.Some species of berries under this definition have multiple seeds, like tomatoes, bananas, and cucumbers.How is this possible?

Accepted Answer

A)  The ovary is mutated and divides abnormally, producing multiple seeds. 
B)  The ovary can contain more than one ovule, each of which produces one seed. 
C)  These fruits result from multiple fertilization events. 
D)  The seeds are produced by apomixis. 
E)  Since fruit classifications are very inconsistent among botanists, some have classified these fruits incorrectly. 
A)  The ovary is mutated and divides abnormally, producing multiple seeds. 
B)  The ovary can contain more than one ovule, each of which produces one seed. 
C)  These fruits result from multiple fertilization events. 
D)  The seeds are produced by apomixis. 
E)  Since fruit classifications are very inconsistent among botanists, some have classified these fruits incorrectly.

Question 18

Billy had a bare patch in his Bermuda grass lawn, and it quickly filled in on its own even though his lawn never went to seed.This vegetative reproduction is likely due to the presence of _______.

Accepted Answer

The answer of Billy had a bare patch in his...

Question 19

Which statement about sexual reproduction in angiosperms and vertebrates is true?

Accepted Answer

A)  The embryo always develops away from the parent. 
B)  An embryo is always derived from egg and sperm from different individuals. 
C)  The egg is always fertilized inside the maternal organism. 
D)  The diploid generation is more prominent and the haploid generation is minimized. 
E)  There are no similarities in sexual reproduction between plants and animals. 
A)  The embryo always develops away from the parent. 
B)  An embryo is always derived from egg and sperm from different individuals. 
C)  The egg is always fertilized inside the maternal organism. 
D)  The diploid generation is more prominent and the haploid generation is minimized. 
E)  There are no similarities in sexual reproduction between plants and animals.

Question 20

The photoperiod receptor that induces flowering is located in the

Accepted Answer

A)  leaves. 
B)  stems. 
C)  roots. 
D)  buds. 
E)  petals. 
A)  leaves. 
B)  stems. 
C)  roots. 
D)  buds. 
E)  petals.

Exam 37: Reproduction in Flowering Plants

In flowering plants, mature male gametophytes consist of _______ cell(s), and mature female gametophytes consist of _______ cell(s).

Photoperiodism is most closely related to what daily rhythms of a plant's life?

If part of a photoperiodically induced plant is grafted to a noninduced plant, which is most likely to occur?

Which characteristic is a benefit of sexual reproduction in plants?

Even if a plant receives an inductive stimulus that would normally lead to flowering, the flowering may be prevented by immediate removal of the

A scientist has perfected a technique, using a microcapillary, for catching sperm as they leave the pollen tube.At which structure should the microcapillary be placed for studying the earliest steps in sperm release?

A newly grown lemon plant is placed next to the parent plant that produced the seed.The two plants prove identical, indicating it was an apomictic seed.What else can be said about this seed?

Which structure is not a modified stem?

Which statement about a genetically self-incompatible species of plant is false?

LEAFY is a _______ whose expression causes vegetative meristem cells to become reproductive, regardless of environmental cues.

Some orchids grow vegetatively and flower underground.However, since the biology of their gametophytes is typical for flowering plants, we can conclude that the male gametophyte

During fertilization in angiosperms, one sperm nucleus fuses with the nucleus of an egg to produce a _______ zygote, and the other sperm nucleus fuses with the polar nuclei to produce a _______ endosperm.

A horticulturalist who wants to induce flowering in a crop of short-day plants should carry out the induction

Which statement about plants produced from seed is generally true?

Which statement about fruits and fruit-bearing plants is false?

Suppose that a certain angiosperm grows both in Colorado and in New England.The Colorado plants reproduce asexually, while those in New England reproduce sexually.What can be inferred about the two environments in which these plants grow?

By strict definition, a berry is a fleshy fruit, without a stone, produced by a single flower with only one ovary.Some species of berries under this definition have multiple seeds, like tomatoes, bananas, and cucumbers.How is this possible?

Billy had a bare patch in his Bermuda grass lawn, and it quickly filled in on its own even though his lawn never went to seed.This vegetative reproduction is likely due to the presence of _______.

Which statement about sexual reproduction in angiosperms and vertebrates is true?

The photoperiod receptor that induces flowering is located in the

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In flowering plants, mature male gametophytes consist of _ cell(s), and mature female gametophytes consist of _ cell(s).

During fertilization in angiosperms, one sperm nucleus fuses with the nucleus of an egg to produce a _ zygote, and the other sperm nucleus fuses with the polar nuclei to produce a _ endosperm.