Question 1

Which of these statements about florigen is not true?

Accepted Answer

A) Florigen is triggered by the ratio of auxin to phytochrome. 
B) The structure of florigen is unknown. 
C) Florigen transferred from a flowering plant to a nonflowering one can trigger flowering. 
D) Florigen is produced in leaves,not flowers. 
E) The florigen response may involve several chemical messengers. 
A) Florigen is triggered by the ratio of auxin to phytochrome. 
B) The structure of florigen is unknown. 
C) Florigen transferred from a flowering plant to a nonflowering one can trigger flowering. 
D) Florigen is produced in leaves,not flowers. 
E) The florigen response may involve several chemical messengers.

Question 2

Among insect-pollinated angiosperms,which of these are the most common pollinators?

Accepted Answer

A) bees 
B) butterflies 
C) fruit flies 
D) moths 
E) ants 
A) bees 
B) butterflies 
C) fruit flies 
D) moths 
E) ants

Question 3

Plants that produce only ovules or only pollen are called

Accepted Answer

A) monoecious plants. 
B) dioecious plants. 
C) hermaphroditic plants. 
D) incomplete plants. 
E) determinant plants. 
A) monoecious plants. 
B) dioecious plants. 
C) hermaphroditic plants. 
D) incomplete plants. 
E) determinant plants.

Question 4

Flowering plants use animals or wind to transfer ________ between flowers.

Accepted Answer

A) spores 
B) CO2 
C) ovules 
D) seeds 
E) pollen 
A) spores 
B) CO2 
C) ovules 
D) seeds 
E) pollen

Question 5

In the ABC model of floral organ identity genes,different combinations of the three genes specify the following different floral organs.Mutants missing the C gene have flowers with only

Accepted Answer

A) petals and sepals. 
B) stamens and carpels. 
C) petals. 
D) sepals. 
E) stamens,carpels,and petals. 
A) petals and sepals. 
B) stamens and carpels. 
C) petals. 
D) sepals. 
E) stamens,carpels,and petals.

Question 6

In the ABC model of floral organ identity genes,different combinations of the three genes specify the following different floral organs.Which of the genes influences the other two?

Accepted Answer

A) A 
B) B 
C) C 
D) florigen 
E) ethylene 
A) A 
B) B 
C) C 
D) florigen 
E) ethylene

Question 7

Plants such as oaks,birches,and corn produce both staminate and pistillate flowers on the same plant.These types of plants are known as

Accepted Answer

A) monoecious. 
B) dioecious. 
C) hermaphroditiC. 
D) complete. 
E) determinant. 
A) monoecious. 
B) dioecious. 
C) hermaphroditiC. 
D) complete. 
E) determinant.

Question 8

The fused carpels of a gynoecium are referred to as

Accepted Answer

A) simple flowers. 
B) corollas. 
C) complete flowers. 
D) compound pistils. 
E) compound stamens. 
A) simple flowers. 
B) corollas. 
C) complete flowers. 
D) compound pistils. 
E) compound stamens.

Question 9

When functional stamens and carpels are both present,but reach maturity at different times,the flowers are said to be

Accepted Answer

A) androecious. 
B) dioecious. 
C) dichogamous. 
D) monoecious. 
E) gynoecious. 
A) androecious. 
B) dioecious. 
C) dichogamous. 
D) monoecious. 
E) gynoecious.

Question 10

A researcher is investigating the morphology of complete flowers.This means that the flowers contain

Accepted Answer

A) calyx,corolla,receptacle,and carpels. 
B) calyx,corolla,carpels,and ovules. 
C) calyx,corolla,stamens,and anthers. 
D) calyx,corolla,carpels,and pistils. 
E) calyx,corolla,androecium,and gynoecium. 
A) calyx,corolla,receptacle,and carpels. 
B) calyx,corolla,carpels,and ovules. 
C) calyx,corolla,stamens,and anthers. 
D) calyx,corolla,carpels,and pistils. 
E) calyx,corolla,androecium,and gynoecium.

Question 11

Which of these is not an example of coevolution between flowers and pollinating bees?

Accepted Answer

A) Bees have tongues to lap up nectar. 
B) Some bees are hairy to collect and carry pollen. 
C) Flowers have ultraviolet markings visible to bees but invisible to most other insects. 
D) Some flowers are bright red with long tubes to hold nectar. 
E) Bees have strong preferences for particular types of flowers and remember where the plants are located. 
A) Bees have tongues to lap up nectar. 
B) Some bees are hairy to collect and carry pollen. 
C) Flowers have ultraviolet markings visible to bees but invisible to most other insects. 
D) Some flowers are bright red with long tubes to hold nectar. 
E) Bees have strong preferences for particular types of flowers and remember where the plants are located.

Question 12

The steps involved in the fertilization of angiosperm flowers include all of the following except

Accepted Answer

A) pollen is transported to a stigma of a flower. 
B) when pollen reaches the stigma of a flower,it begins to grow a pollen tube that pierces the style. 
C) the style of the pistil contracts to bring the sperm closer to the embryo saC. 
D) the pollen tube grows until it reaches the ovule in the ovary. 
E) double fertilization produces an embryo and the endosperm. 
A) pollen is transported to a stigma of a flower. 
B) when pollen reaches the stigma of a flower,it begins to grow a pollen tube that pierces the style. 
C) the style of the pistil contracts to bring the sperm closer to the embryo saC. 
D) the pollen tube grows until it reaches the ovule in the ovary. 
E) double fertilization produces an embryo and the endosperm.

Question 13

Angiosperms use which temporary reproductive structures that are not present in any other group of plants?

Accepted Answer

A) cones 
B) carpels 
C) receptacles 
D) flowers 
E) seeds 
A) cones 
B) carpels 
C) receptacles 
D) flowers 
E) seeds

Question 14

Which of the following statements about the angiosperm embryo sac is false?

Accepted Answer

A) It contains eight nuclei. 
B) It is the gametophyte generation of the plant. 
C) The nuclei within the embryo sac are diploid. 
D) The synergids flank the egg cell. 
E) The embryo sac nuclei are produced by mitosis of a megasporE. 
A) It contains eight nuclei. 
B) It is the gametophyte generation of the plant. 
C) The nuclei within the embryo sac are diploid. 
D) The synergids flank the egg cell. 
E) The embryo sac nuclei are produced by mitosis of a megasporE.

Question 15

In a wind-pollinated flower,which of these flower parts would probably be inconspicuous or missing?

Accepted Answer

A) receptacle 
B) stamens 
C) pistils 
D) petals 
E) stigmas 
A) receptacle 
B) stamens 
C) pistils 
D) petals 
E) stigmas

Question 16

All of the following are modes of vegetative reproduction except

Accepted Answer

A) runners. 
B) rhizoids. 
C) apomixis. 
D) suckers. 
E) rhizomes. 
A) runners. 
B) rhizoids. 
C) apomixis. 
D) suckers. 
E) rhizomes.

Question 17

The androecium is a collective term for the

Accepted Answer

A) carpels. 
B) stamens. 
C) petals. 
D) sepals. 
E) ovules. 
A) carpels. 
B) stamens. 
C) petals. 
D) sepals. 
E) ovules.

Question 18

Which of the following statements about flowering plants is true?

Accepted Answer

A) A short-day plant requires nights longer than a certain critical period to trigger flowering. 
B) A long-day plant requires nights shorter than a certain critical period to inhibit flowering. 
C) A short-day plant requires daylight of short wavelengths. 
D) A long-day plant requires long wavelengths during the night. 
E) A long-day plant requires long days alternating with short days. 
A) A short-day plant requires nights longer than a certain critical period to trigger flowering. 
B) A long-day plant requires nights shorter than a certain critical period to inhibit flowering. 
C) A short-day plant requires daylight of short wavelengths. 
D) A long-day plant requires long wavelengths during the night. 
E) A long-day plant requires long days alternating with short days.

Question 19

What is the best description of double fertilization in angiosperms?

Accepted Answer

A) One sperm fertilizes the egg,which develops into the embryo;the other sperm fertilizes the ovary,which becomes the fruit. 
B) One sperm fertilizes the egg,which develops into the embryo;the other sperm fertilizes the polar nuclei,which forms the endosperm. 
C) One sperm fertilizes the egg,which develops into the embryo;the other sperm fertilizes the polar nuclei,which forms the seed coat. 
D) One sperm fertilizes the egg,which develops into the embryo;the other sperm produces the pollen tube. 
E) One pollen grain fertilizes the embryo sac;the other sperm fertilizes the pollen grain. 
A) One sperm fertilizes the egg,which develops into the embryo;the other sperm fertilizes the ovary,which becomes the fruit. 
B) One sperm fertilizes the egg,which develops into the embryo;the other sperm fertilizes the polar nuclei,which forms the endosperm. 
C) One sperm fertilizes the egg,which develops into the embryo;the other sperm fertilizes the polar nuclei,which forms the seed coat. 
D) One sperm fertilizes the egg,which develops into the embryo;the other sperm produces the pollen tube. 
E) One pollen grain fertilizes the embryo sac;the other sperm fertilizes the pollen grain.

Question 20

If a plant self-pollinates and has complete flowers,then it must be

Accepted Answer

A) dichogamous. 
B) monoecious. 
C) dioecious. 
D) staminate. 
E) pistillatE. 
A) dichogamous. 
B) monoecious. 
C) dioecious. 
D) staminate. 
E) pistillatE.

Exam 42: Plant Reproduction

Which of these statements about florigen is not true?

Among insect-pollinated angiosperms,which of these are the most common pollinators?

Plants that produce only ovules or only pollen are called

Flowering plants use animals or wind to transfer ________ between flowers.

In the ABC model of floral organ identity genes,different combinations of the three genes specify the following different floral organs.Mutants missing the C gene have flowers with only

In the ABC model of floral organ identity genes,different combinations of the three genes specify the following different floral organs.Which of the genes influences the other two?

Plants such as oaks,birches,and corn produce both staminate and pistillate flowers on the same plant.These types of plants are known as

The fused carpels of a gynoecium are referred to as

When functional stamens and carpels are both present,but reach maturity at different times,the flowers are said to be

A researcher is investigating the morphology of complete flowers.This means that the flowers contain

Which of these is not an example of coevolution between flowers and pollinating bees?

The steps involved in the fertilization of angiosperm flowers include all of the following except

Angiosperms use which temporary reproductive structures that are not present in any other group of plants?

Which of the following statements about the angiosperm embryo sac is false?

In a wind-pollinated flower,which of these flower parts would probably be inconspicuous or missing?

All of the following are modes of vegetative reproduction except

The androecium is a collective term for the

Which of the following statements about flowering plants is true?

What is the best description of double fertilization in angiosperms?

If a plant self-pollinates and has complete flowers,then it must be

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