Deck 39: Flowering Plants: Reproduction

Question 1

If a pollen grain lands on the stigma of a plant that is not related to that plant then the following would happen:

A) The pollen grain would be too large or too small to enter the stigma.
B) The pollen would likely not attach to the stigma.
C) The pollen grain would be unable to grow through the stigma.
D) The pollen grain would be unable to form sperm nuclei.
E) The pollen grain would be ejected from the stigma.

Answer 1

The pollen grain would be unable to grow through the stigma.

Question 2

One advantage of cross-pollination in plants would be to provide:

A) different forms of double fertilization
B) more healthy seeds
C) better embryos for the seed to grow
D) a better chance for germination on the stigma
E) more exchange of genetic information

Answer 2

more exchange of genetic information

Question 3

A fruit could best be described as:

A) developing from a flower
B) development from the ovule
C) an endosperm extension
D) part of the gametophyte generation
E) None of these is true

Answer 3

developing from a flower

Question 4

Which of the following is NOT a characteristic of seeds?

A) They contain endosperm.
B) They have an embryo.
C) They may differ in amount of water content.
D) They usually vary in size.
E) They usually have about the same amount of water.

Question 5

Two important events that lead to a successful germination of seeds is:

A) length of daylight
B) sunlight and water
C) sunlight and temperature
D) daylight and night time temperatures
E) relative humidity and water content of the seed

Question 6

Perhaps the most important single environmental factor responsible for flower formation is:

A) appropriate weather
B) appropriate temperature
C) adequate water
D) soil type
E) day length

Question 7

Which of the following describes the sequence of events that might occur in a long-day plant when a stem begins to produce flower parts?

A) CONSTANS (CO) protein, flowering gene (FT), messenger RNA, phloem transport to the meristem
B) flowering gene (FT), CONSTANS (CO) protein, messenger RNA, phloem transport to the meristem
C) messenger RNA, phloem transport to the meristem, CONSTANS (CO) protein, flowering gene (FT)
D) messenger RNA, phloem transport to the meristem, CONSTANS (CO) protein, flowering gene (FT), phloem transport to the meristem
E) phloem transport to the meristem, CONSTANS (CO) protein, flowering gene (FT), messenger RNA

Question 8

The single most important difference between long-day and short-day plants would be the accumulation of which of the following?

A) phloem transporting genes
B) CONSTANS (CO) proteins
C) florigen
D) messenger RNA
E) flowering time genes (FT)

Question 9

One application of knowledge of when flowering occurs is related to:

A) pollen allergy reactions
B) how much water the plant is receiving
C) how often to expect plants to flower
D) temperature relationships
E) when to expect insects to be more abundant

Question 10

Basically a flower is composed of four concentric rings or parts known as:

A) calyxes
B) spales
C) whorls
D) androeciums
E) gynoeciums

Question 11

The term monoecious is best described as referring to the flower in what way?

A) It refers to the number of flower parts.
B) It describes where the parts are located.
C) It has nothing to do with flower parts.
D) It refers to the carpellate and staminate parts.
E) It means there are missing parts on the flower.

Question 12

Plants that are dioecious are best described as having:

A) staminate and carpellate flowers on separate plants
B) all flower parts in pairs
C) flower parts that may be absent at certain seasons
D) flower arrangements unique to eudicots
E) flower arrangements unique to monocots

Question 13

Knowledge of silencing genes provided scientists with clues to the expression of what characteristic in flowers such as petunia?

A) number of flower parts
B) placement of flower parts
C) color expression
D) vitamin deficiencies
E) time of flowering

Question 14

Callose has what effect on pollen?

A) aids differentiation and attachment of pollen to the carpel
B) aids pollen development and helps pollen tubes to grow
C) aids pollen coat development
D) aids pollen coloration
E) aids the separation of pollen grains from the anther

Question 15

We now know that one reason Mendel's classic studies with peas were successful is because peas are:

A) different shapes
B) different colors
C) have other traits that we now know about
D) develop as a result of well-kept gardens
E) are self-pollinating

Question 16

Fluorescence microscopy has been helpful in observing:

A) attachment of pollen grains to the anther
B) pollen tube development in the style
C) time involved in pollen release from anthers
D) location of pollen within the anther
E) The size of pollen grains

Question 17

Which of the following would NOT be part of the germ tube?

A) tube cell nucleus
B) two sperm cells
C) pollen sporopollenin wall
D) pectin precursors
E) cell membrane

Question 18

The only triploid stage in the life cycle of a flowering plant is the:

A) zygote
B) embryo
C) endosperm
D) egg
E) stigma tissue

Question 19

The primary role of the two sperm produced in the germ tube of the pollen is to

A) release proteins for germination
B) aid the plant's seed production
C) ensure that there will be fertilization of the egg and the two central cells
D) ensure production of an embryo
E) allow the endosperm to become a seed

Question 20

It has been estimated that 70% of human and animal food ________ comes from seed endosperm of grain crops.

A) carbohydrate
B) fat
C) vitamins
D) protein
E) minerals

Question 21

The reason legumes are valued as food plants is because of their high content of:

A) carbohydrates
B) fats
C) vitamins
D) minerals
E) proteins

Question 22

The seed coat often restrains embryos from growing and prevents the entry of water and oxygen to the seed.

Question 23

An understanding of the role of abscisic acid (ABA) could help better understand why some seeds need light in order to germinate.

Question 24

Seedless fruits may be produced by use of certain plant hormones.

Question 25

One reason plant growers might use vegetative reproduction rather than conventional breeding of plants would be to maintain genetic uniformity in the plant.

Question 26

Somatic embryogenesis allows for the production of genetically identical plants from cells other than reproductive cells.

Question 27

A plant that is dioecious could also have perfect flowers.

Question 28

A bilaterally symmetrical flower has only two equal parts.