|
Meiosis will produce microspores in the |
Anther |
|
anther |
male reproductive microspores |
|
Which association below is correct? |
dioecious … separate female and male plants |
|
dioecious |
the males and females are on separate plants |
|
In angiosperms, each pollen grain produces two sperm. What do these sperm do? |
One fertilizes an egg, and the other combines with two polar nuclei, which develop into stored food cells (endosperm) Fertilization of an egg produces a zygote, and the combination of the two polar nuclei produces a triploid cell that will develop into the endosperm |
|
The germination of seeds |
depends on imbibition |
|
Imbibition |
absorption of water by the seed, causes the seed to expand and rupture |
|
Which of the following is an example of sexual reproduction? |
fusion of sperm and egg nuclei in an ovule |
|
Which of the following is an advantage of asexual reproduction in plants? |
enhanced survival of genetically favorable offspring |
|
Self-incompatibility |
helps maintain genetic variability in a population |
|
In grafting, the plant that provides the root system is the _____ and the twig is the _____ |
stock … scion |
|
stock plant |
provides the root system |
|
scion |
grafted twig |
|
Which of the following is one possible advantage of biofuels vs. oil? |
The CO2 produced by biofuels will be absorbed by the crops used to produce them, creating a carbon-neutral cycle |
|
Which example below is a concern related to the debate over plant biotechnology? |
introduced genes spreading into related wild species and leading to the creation of "superweeds" |
|
Plant hormones act by directly affecting the activities of |
signal transduction pathways |
|
Plant hormones act by activating/deactivating |
signal transduction pathways |
|
Which of the following seedlings will probably bend toward light? |
one whose tip is separated from its base by a gelatin block |
|
gelatin block |
allows the passage of substances that regulate phototropism |
|
The Pr form of the phytochrome pigment has maximum absorption in the _____ part of the spectrum. |
red |
|
A biological cycle with a period of about 24 hours is called |
a circadian rhythm |
|
a circadian rhythm |
events that follow approximately 24-hour cycles |
|
Most plants flower when The flowering of many plants is stimulated by the duration of periods of uninterrupted darkness |
the nights are the right length |
|
The molecule most involved in the flowering process is |
FT protein |
|
Thigmotropism is a movement in response to |
touch |
|
Thigmotropism |
directional growth in response to touch |
|
Which one of the following is a response in plants to a water deficit? |
reduction in the rate of transpiration |
|
Strains of pathogens that mildly harm, but do not kill, the host plant are termed |
avirulent |
|
avirulent pathogen |
gains enough access to its host to enable it to perpetuate itself without severely damaging or killing the plant |
Share This
Flashcard
