Isogamy: It is the fusion of similar size gametes. ie if male gamete and female gamete which are in same size fuse, then the type of fertilization is called isogamy. And also the male and female gametes look alike .
Oogamy: It is the fusion of unequal size gametes. ie., the male gamete is smaller than female gamete. The human sperm is smaller then female egg and the fusion of these two is called Oogamy.
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it is kind of sexual reproduction in which similar morphology as
well as physiology gametes are fuse to form zygote.
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There are various types of submerged plants, they may be algae ,
brophytes ,pteridophytes, gymnosperms and angiosperms.
Submerged plants also reproduce like terrestrial ones.
There may be isogamy , anisogamy, oogamy.
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According to SOWPODS (the combination of Scrabble dictionaries
used around the world) there are 2 words with the pattern -S---MY.
That is, seven letter words with 2nd letter S and 6th letter M and
7th letter Y. In alphabetical order, they are: