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Vernalization induces flowering following exposure to |
a. water. |
b. drought. |
c. cold. |
d. heat |
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- In flowers, the structures that produce male gametophytes are called _______ ;the strcutures that produce female gametophytes are called _______ . a. pollen grains; flowers c. anthers; stigma b. stamen; carpels d. megaspores; microsporesPlant tissue culture takes advantage ofa. phototropism.b. gravitropism.c. asexual reproduction from tubers.d. totipotency.Flower shape and color can be linked to the process ofa. pollination.b. photosynthesis.c. germination.d. secondary growth
- A seed protects thea. embryo. b. ovule. c. ovary.d. pollen grain.Which of the following is True?a. Ethylene stimulates abscission layers to form.b. Abscisic acid causes abscission layers to form.c. Ethylene is sometimes sprayed on flowers to keep them fresh.d. Abscisic acid stimulates seed germination.C. For numbers 21 to 24, match the parts of the flower with what they will develop into after fertilization. A. Endosperm of the seed B. Plant embryo C. Fleshy fruit that can be D. Whole seed E. Seed coat eaten 21. Ovule 23. Polar Nuclei 22. Ovary 24. Egg
- Which of the following is NOT regulated by Gibberellins? seed germination a. b. fruit growth gravitropism Oc. stem elongation d.A seed containsa. a seed coat. b. cotyledon(s).c. an embryo. d. stored food.e. All of these are correct.Presence of all of the following factors promotes dormancy of seeds, except a.Phenolics b.Impermeable seed coat c.Immature embryo d.Gibberellins
- Which of the following is true regarding germination? a. Imbibition of water is the first step of germination b. All are true regarding germination c. Shoots emerge first, then roots d. The seed coat stays intact during germination e. Freezing and thawing can help start germinationPlant development is influenced by: A. quality of light only B. quality and quantity of light C. quality and duration of light D. quality, quantity and duration of lightMeiosis occurs within the: A. Endosperm B. Petal C. Ovary D. Ovule E. Stigma