Pollination with the help of water takes place below the surface of the water. The plant is bisexual, but individual flowers are unisexual. 2. Examples: Ceratophyllum, Najas Zostera and Hydrilla Specific gravity is found in pollen grains so they remains suspended in water. The floral parts are commonly leathery. There are some bisexual flowers that never open. Type of Ovule Example a Orthrotropous w Pea b Anatropous x Ranunculus c Amphitropous y Betel d Campylotropous z Brassica 1) a-y, bz, c x, dw 2) a w, c z3) a z, b w, c y 4) a –w, b y, c 8 Type of pollination seen in Vallisneria is 1)Entamophily 2) Epihydrophily 3) Hypohydrophily 4) Anemophily Hypohydrophily: Hypohydrophily is a true hydrophily that occurs beneath the surface of the water. Q. Functional megaspore in an angiosperm develops into [NEET-2017] Q. Hypohydrophily occurs in the obligately submersed species, C. hermaphroditica L. (Philbrick, Hypohydrophily in zostera 20. They usually have small size and long beaks. Examples Bone density is suggested to be multifactorially regulated and polygenically determined. Example : Characters : Ornithophilous flowers are usually brightly coloured— red, orange, yellow or blue. As a result, the pollen grain are distributed on the stigma of the same flower. Examples : Mirabilis, Gardenia, etc. The ornithophilous flowers secrete abundant watery nectar or have edible parts. Inner to the corolla, the whorl of androecium can be seen as stamens are present. Ex: Najas, Ceratophylum, Zostera. 3. Generally, flowers are unisexual. This is a condition in which the flowers remain closed. Example: Zostera marina, Ceratophyllum, etc. Such flowers are small, inconspicuous and lack colour and fragrance. It is seen that the thalamus is swollen and the ovary is superiorly located than the other floral organs. Answer:Most of the private hospital and private schools located in major cities and not in towns or rural areas bcz government are focusing more on the cities a… When both the male and female sex organs are present in the same flower, it is called bisexual. 2. There are two types of hydrophilic pollination Hypohydrophily and b) Epihydrophily. List the three sources of naturally occurring materials Get the answers you need, now! 5. Type of Ovule Example a Orthrotropous w Pea b Anatropous x Ranunculus c Amphitropous y Betel d Campylotropous z Brassica 1) a-y, bz, c x, dw 2) a w, c z3) a z, b y 4) a –w, b y, c Ans:1 8 Type of pollination seen in Vallisneria is 1)Entamophily Ans:2 2) Epihydrophily 3) Hypohydrophily 4) Anemophily Examples : Commelina, wood-sorrel, etc. Epihydrophily has been reported for var-ious amphibious species, although supporting evidence is usually anecdotal (see discussion in Philbrick and An-derson, 1992). (ii) Hypohydrophily: When the pollination takes place inside the water, it is called hypohydrophily. water surface) and hypohydrophily (pollination below the water surface). 3. 20 6.Methods to Ensure Cross pollination Dichogamy: The maturation of the stamens and pistils of a bisexual flower at different times, so that self-pollination is prevented. The largest cell of the mature embryo sac is The gynoecium is visible at the very centre of the flower. Scent is often absent. It occurs in completely submerged plants and their pollen grains are waterborne. Examples: Vallisneria and Ruppia. Several pollination syndromes have been suggested to occur within the genus, including anemophily, epihydrophily, and hypohydrophily. 19 Hypohydrophily: pollination occurring beneath the water surface. It is seen in totally submerged marine plants (hydrophytes) like Ceratophyllum. dr.aarif POLLINATIO N Floral Adaptations of HYPOHYDRODROPHILY HYPOHYDROPHILY : 1. 3. 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