A(An) ______ is an organic molecule synthesized by a plant that has physiological and/or developmental effects.
Which of the following plant hormones is NOT a growth promoter?
Which of the following plant hormones acts to cause a leaf and/or fruit to drop?
Which of the following plant hormones affects stem elongation?
Violets and tulips flower in the spring; asters and goldenrods flower in the fall. This indicates that flowering is controlled by ______ .
|E)||plant hormones alone|
A response based on the proportion of light to darkness in a 24-hour cycle is called ______ .
|E)||alternation of generations|
______ plants initiate flowering when the days get shorter than a critical length.
A particular plant does not flower when the day is shorter than a critical length. However, when the day is longer than a critical length, it will flower. If a long night is interrupted by a flash of light, the plant will also flower. Such a plant is classified as a ______ plant.
______ is a pigment that is part of a biological clock system that helps control flowering.
The photoperiod of a plant refers to the relative periods of light and dark that controls their flowering response.
Which pigment detects the photoperiod and the presence of sunlight so as to regulate the life cycle and growth of a plant?
Plants bend toward the light so as to promote photosynthesis. This occurs because auxin is transported to the _____ , causing the cells on this side to elongate.
|A)||shady side of the shoot|
|B)||sunny side of the shoot|
|C)||shady side of the root|
|D)||sunny side of the root|
Which of the following plant hormones can cause the base of a shoot to form new roots and prevents fruit from dropping too soon?
Which plant hormone is classified as an inhibitor and causes fruit to ripen?
Plant hormones may promote or inhibit growth.
Flowering in plants is controlled by the length of continuous daylight, not continuous darkness.
In order to flower, short-day plants require a period of darkness longer than a critical length, and long-day plants require a period of darkness shorter than a critical length.
In flowering plants, the sex organs for sexual reproduction are located in the ______ .
Which of the following is NOT part of a flower?
Which part of a flower forms a small vaselike structure in the center of the flower?
In which part of a flower will ovules be found?
Which of the following associations is NOT a comparison of male and female parts?
|D)||embryo sac--pollen sac|
Which part of a flower is an enlarged sticky knob?
Pollination occurs when ______ .
|A)||pollen from the stigma is transferred to the anther of the ovary|
|B)||pollen from the anther is transferred to the stigma of the ovary|
|C)||pollen from the anther is transferred to the style of the ovary|
|D)||sperm in the pollen tube combines with the egg in the ovule|
|E)||sperm in the pollen tube combines with the polar nuclei in the ovule|
Which generation in a flowering plant is diploid and can produce haploid spores?
Which of the following statements is NOT correct about alternation of generations in flowering plants?
|A)||The gametophyte generation is haploid.|
|B)||The sporophyte generation is diploid.|
|C)||The gametophyte generation produces haploid microspores and megaspores.|
|D)||The microspore becomes a pollen grain, which upon maturity becomes a male gametophyte.|
|E)||The megaspore becomes an egg-containing embryo sac, which is the female gametophyte.|
Which of the following statements is NOT correct about reproduction in flowering plants?
|A)||The pollen grain, or male gametophyte, will contain two cells, the generative cell and the tube cell.|
|B)||The female gametophyte, or embryo sac, consists of eight haploid nuclei, one of which is the egg and two polar nuclei.|
|C)||One sperm nucleus within the pollen tube will migrate to and fertilize the egg, forming a zygote.|
|D)||Another sperm nucleus within the pollen tube will migrate to and unite with the polar nuclei, producing a diploid endosperm.|
Which of the following is the correct sequence for the pollen tube to eventually reach the egg in a flowering plant?
|A)||stigma, style, ovary, ovule|
|B)||stigma, ovary, ovule, style|
|C)||style, stigma, ovary, ovule|
|D)||ovary, ovule, stigma, style|
|E)||ovule, ovary, style, stigma|
Which of the following is NOT part of a seed produced by a flowering plant?
Which part of a flower protects seeds and sometimes aids in the dispersal of seeds?
Which of the following provides nutrient molecules for the growing embryo?
|A)||cotyledons and endosperm|
|B)||epicotyl and hypocotyl|
Which of the following lies below the attachment of the cotyledons and becomes a portion of the stem?
The ______ is the embryonic root at the lower end of the hypocotyl.
Upon germination, the ______ of an embryo will give rise to the leaves.
Microspores are produced in the ______ .
The structure of a pollen grain does NOT vary between plant species.
Which of the following is the correct sequence?
|A)||fertilization, pollination, germination|
|B)||fertilization, germination, pollination|
|C)||pollination, fertilization, germination|
|D)||pollination, germination, fertilization|
|E)||germination, fertilization, pollination|
Pollinators help bring the sperm and egg together in flowering plants so that growth can occur.
After fertilization, the fertilized ______ becomes the seed and the ______ becomes the fruit of the plant.
Following fertilization, the zygote develops into an embryo located within a seed.
To a botanist, peas and beans are classified as fruits and not as vegetables.
Plants that have one cotyledon are called monocots.
Each type of food is associated with a particular organ of a flowering plant. Wheat, rice, corn, and apple are the ______ .
Each type of food is associated with a particular organ of a flowering plant. Pea, navy bean, lima bean, nuts, and coffee beans are the ______ .
In ______ , a portion of one plant gives rise to a completely new plant.
|A)||alternation of generations|
Strawberry plants can reproduce asexually by forming ______ .
______ are plant cells that have been chemically stripped of their outer cell wall.
Which method is used to develop clonal plants?
|B)||cell suspension cultures|
Flowering plants can reproduce only sexually.
In both vegetative propagation and sexual reproduction in flowering plants, the original and the new plants have identical genes.