Deck 33: Plant Reproduction and Growth

Question 1

__________ auxins,such as 2,4-D,are routinely used to control weeds and are applied in concentrations higher than would occur in the plant tissues such that weeds literally "grow to death."

A) Synthetic
B) Natural
C) Organic
D) Methylated

Answer 1

A

Question 2

What characteristic describes wind-pollinated angiosperms?

A) Small,yellow flowers
B) Plants grow in close proximity to each other
C) Red flowers to attract birds
D) All of these are correct.

Answer 2

B

Question 3

What is the primary purpose of a fruit?

A) To aid in seed dispersal
B) To reward animals for pollination
C) To feed the growing embryo of the plant
D) To deter predators

Answer 3

A

Question 4

The response of plants to touch is known as

A) phototropism.
B) gravitropism.
C) thigmotropism.
D) photoperiodism.

Question 5

This hormone in combination with auxin stimulates cell division in plants.

A) Abscisic acid
B) Cytokinin
C) Auxin
D) Gibberellin
E) Ethylene

Question 6

When applied to underripe fruit,the hormone _____________ hastens ripening.

A) auxin
B) gibberellin
C) ethylene
D) abscisic acid

Question 7

The plant response in which stems grow upward and roots grow downward is called

A) phototropism.
B) gravitropism.
C) thigmotropism.
D) photoperiodism.

Question 8

The phenomenon known as phototropism is due to the plant hormone _____________,which regulates cell growth.

A) abscisic acid
B) cytokinin
C) auxin
D) gibberellin

Question 9

The entire series of events that occur between fertilization and the development of the seed is called germination.

Question 10

Angiosperms that contain separate male and female flowers on the same plant are called

A) perfect.
B) monecious.
C) clones.
D) gametophytes.

Question 11

Germination of the embryo within the seed does not take place until

A) any amount of sunlight strikes the seed.
B) daylength is appropriate for the plant.
C) water and oxygen reach the embryo.
D) the seed has passed through the gut of an animal.

Question 12

Male gametophytes are also known as _________________ and they develop from microspores.

A) embryos
B) megaspores
C) pollen grains
D) anthers

Question 13

What is the mechanism by which synthetic auxins are routinely used to control weeds?

A) They cause weeds to grow so fast they reduce their ATP production so no energy is left for other essential plant functions.
B) They disrupt the plasma membrane of plant cells causing them to leak and die.
C) They interfere with protein synthesis in the cell.
D) They interfere with DNA synthesis in the cell.
E) They cause the plant cell wall to disintegrate.

Question 14

_________________ is a plant hormone that controls stomatal closure and has some effect on the dormancy of many seeds.

A) Abscisic acid
B) Cytokinin
C) Auxin
D) Gibberellin

Question 15

Early in the development of an angiosperm embryo,the embryo becomes dormant.This dormancy occurs

A) after fertilization.
B) once the root and shoot have penetrated the seed coat.
C) after the apical meristems and the cotyledons are differentiated.
D) All of these are correct.

Question 16

Some plants reproduce asexually through horizontal stems called

A) suckers.
B) runners.
C) rhizomes.
D) both runners and rhizomes.

Question 17

When a plant's pollen moves to one of its own stigmas,this is called

A) self-incompatibility.
B) self-germination.
C) outcrossing.
D) self-pollination.

Question 18

In angiosperms,an unusual reproductive process involving two sperm cells occurs,called

A) double fertilization.
B) self-pollination.
C) pollen tube formation.
D) germination.

Question 19

When plants reproduce asexually,the offspring are called

A) embryos.
B) seeds.
C) clones.
D) carpels.

Question 20

Which of these has evolved in angiosperms to attract pollinators to their flowers?

A) Nectar
B) Colorful petals
C) Specific flower shapes
D) All of these are correct.

Question 21

In plants,hormones are produced in endocrine glands.

Question 22

Your brother asks you to bring him a pome.Which of the following would you give him?

A) pear.
B) grapes.
C) tomatoes.
D) peppers.
E) olives.

Question 23

The house plant Kalanchoe daigremontiana produces ____________ to reproduce asexually.

A) runners
B) adventitious plants
C) suckers
D) rhizomes

Question 24

In some plants,flowering is controlled by seasonal changes in relative day and night length,also called

A) phototropism.
B) gravitropism.
C) thigmotropism.
D) photoperiodism.

Question 25

Once a pollen grain reaches the stigma of a flower,it begins to grow a _____________ that pierces the style.

Question 26

When pollen from a flower's anther pollinates the same flower's stigma,the process is called _____________________.

Question 27

Which of the following plants produces seeds that germinate successfully under water?

A) Corn
B) Apples
C) Rice
D) Wheat
E) Daffodils

Question 28

The __________ and ___________ give rise to all of the other cells of the adult plant.

A) phloem;xylem
B) shoot apical meristem;root apical meristem
C) vascular cambium;cork cambium
D) pericycle;bud primordia
E) bud primordial;leaf primordia

Question 29

The response of plants to touch is called _______________________.

Question 30

Who wrote the book "The Power of Movement in Plants"?

A) Linus Pauling
B) Louis Pasteur
C) Charles Darwin
D) Francis Crick
E) Fritts Went

Question 31

The first leaves that emerge from a seed are the _________________.

Question 32

Give an example of a wind-pollinated plant._____________________

Question 33

Which of the following types of plants produce "suckers",or sprouts,which give rise to new plants?

A) Cherry
B) Apple
C) Raspberry
D) Blackberry
E) All of the choices are correct.

Question 34

____________ is the mechanism by which organisms measure seasonal changes in relative day and night length.

Question 35

This hormone is used commercially to space out the flowers of grape vines by promoting stem elongation.

A) Abscisic acid
B) Cytokinin
C) Auxin
D) Gibberellin
E) Ethylene

Question 36

In order to delay the ripening of tomatoes,the gene for this hormone has been disrupted in genetically engineered tomatoes.

A) Gibberellin
B) Auxin
C) Cytokinin
D) Abscisic acid
E) Ethylene

Question 37

All plants have both male and female reproductive structures together in the same individual flower.

Question 38

Within the embryo sac of the angiosperm,______ nuclei are arranged in precise positions.

A) 2
B) 4
C) 6
D) 8
E) 10

Question 39

The female gametophyte is the _______________,which develops from a megaspore.

Question 40

All of the following fruits are classified as drupes except

A) olives.
B) pears.
C) plums.
D) cherries.

Question 41

Describe the mechanism whereby the length of a long night allows for flowering in short day plants.

Question 42

The hormone that causes growing plants to bend toward light is called ____________.

Question 43

Describe double fertilization.

Question 44

The bending of growing plants toward light is a response called ____________.

Question 45

Flowering plants respond to day and night length in part through the pigment ________________,which exist in two interconvertible forms.

Question 46

Explain the significance of C.Steward's experiments in the 1950s.F.

Question 47

Describe how adventitious plantlets form.