Domesticated banana plants produce seedless fruit because they are______ . a. triploid d. propagated by grafting b. monocots e. treated with colchicine c. endangered f. infected with Phylloxera
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Domesticated banana plants produce seedless fruit because they are______ .
a. triploid d. propagated by grafting
b.
c. endangered f. infected with Phylloxera
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- буmnosperms Type of spore formed by heterosporous species which give rise to female gametophytes. A. Hetrospores B. Mergasporngiav C. Homospores D. MegasporesMeiosis of cells in pollen sacs forms haploid______ . a. megaspores c. stamens b. microspores d. sporophytesMatch the terms appropriately. ___ ovule a. gamete-producing body ___ cuticle b. spore-producing body ___ gametophyte c. where eggs form ___ sporophyte d. underground stem ___ fruit e. mature ovary ___ endosperm f. nutritive tissue in seed ___ rhizome g. where fern spores form ___ sorus h. secreted waxy layer
- Exposure to______ can trigger seed germination. a. light c. smoke b. cold d. all can be triggersThe arrival of pollen grains on a receptive stigma is called_____ . a. germination c. pollination b. fertilization d. propagationIn an alternation of generations life cycle, spores developinto____________ that produce gametes that fuse to giverise to__________ .a. haploid gametophytes; diploid sporophytesb. diploid gametophytes; haploid sporophytesc. haploid sporophytes; diploid gametophytesd. diploid sporophytes; haploid gametophytes
- After double fertilization, a zygote and ________ form. a. an ovule b. endosperm c. a cotyledon d. a suspensorThe fertilized ovule gives rise to the ________. a. fruit b. seed c. endosperm d. embryo1.Spraying some plants with a combination of auxin and gibberellins will . A. promote ripening of fruits B. promote fruit formation C. preventing senescence D. enlargers’ fruit growth 2. All lowering plants belong to class . A. conifers B. angiospermae C. felicinae D. gymnospermae
- Key features of seed plants facilitating life on land include three of the following four traits. Which of these is an exception? a. Reduced gametophytes b. Pollen c. Homospory d. Seeds Which of these will most likely happen when bryophyte spores are dispersed to a favorable habitat, such as a moist soil or tree bark? a. They will germinate and grow into sporophytes. b. They will germinate and grow into haplophytes. c. They will germinate and grow into chlorophytes. d. They will germinate and grow into gametophytes. Which of the following is the purpose of having cuticles only at the upper surface of thallus of a non-vascular plant like a moss? a. Direct water and nutrient absorption b. Efficient exchange of gases c. Faster generation of osmotic pressure in leptoids d. Easier diffusion of carbon dioxideMost gymnosperm seeds _______________. Select one: a. have attached wings to aid in dispersal b. grow as groups in thick pouches inside of woody cones c. have very little viability d. possess no seed coat e. none of the above answers f. have triploid endosperm, the product of double fertilization1. Ovary will become the _____. A.seed coat B.fleshy fruit that can be eaten C.whole seed D.endosperm of the seed E.plant embryo 2. If the testes fail to descend, a male is infertile because sperm cell formation is prevented by _____. A.excessive production of estrogen B.none of the choices C.all of the choices D.lack of testosterone E.relatively high internal body temperature 3. An egg develops to an amphibian without being fertilized by an egg. A.Isogamy B.Sporulation C.Parthenogenesis D.Asexual Reproduction E.Sexual Reproduction