| | Conjugation Spirogyra, a freshwater filamentous alga, also exhibits conjugation, where two nearby filaments develop extensions that contact each other. The walls between the connecting channels disintegrate, and one cell moves through the conjugation tube into the other. The cells fuse to form a diploid zygote, the only diploid stage in the life of Spirogyra. Read more: Sexual Reproduction - Conjugation - Cells, Cell, Occurs, Fuse, Mold, and Zygote http://science.jrank.org/pages/6098/Sexual-Reproduction-Conjugation.html#ixzz1Q2KUB3h7
The Evolution of Sexual Reproduction NOTE: These are lecture notes for Biology 391, Organic Evolution For example, in water fleas (crustaceans in the genus Daphnia), which live in ponds, reproduction is asexual -- females produce females asexually -- throughout the spring and summer, but when they are getting ready to produce the forms that will overwinter and hatch out the next spring (possibly in a very different environment, since it will be a different year), males are produced and then they reproduce sexually. So sexual reproduction is timed to occur when the environment is about to change. http://www.utm.edu/departments/cens/biology/rirwin/391/391SexEvol.htm
Homosexual Activity Among Animals Stirs Debate James Owen in London- for National Geographic News - July 23, 2004 Birds do it, bees do it, even educated fleas do it. So go the lyrics penned by U.S. songwriter Cole Porter.
Porter, who first hit it big in the 1920s, wouldn't risk parading his homosexuality in public. In his day "the birds and the bees" generally meant only one thing—sex between a male and female. But, actually, some same-sex birds do do it. So do beetles, sheep, fruit bats, dolphins, and orangutans. Zoologists are discovering that homosexual and bisexual activity is not unknown within the animal kingdom. http://news.nationalgeographic.com/news/2004/07/0722_040722_gayanimal.html
A Robot that Tracks ALL the Genes in a Cell Reveals Key Patterns: Yeast Researchers Get a Head Start How Similar Are We To Baker's Yeast? It is hard enough to accept that little creatures such as worms and flies are, as one researcher put it, "our relatives," but what about baker's yeast? What can we possibly have in common with this humble cell, really just a fungus, which is generally used to make dough rise or to brew beer? The answer is stunning: We are so similar to yeast, in some of our genes, that human DNA can be substituted for the equivalent yeast gene—and it works just as well. This was first demonstrated in 1985 ... Howard Hughes Medical Institute here http://www.hhmi.org/genesweshare/a110.html
(My comment: According to Objectivism, animals have automatic modes of survival. They cannot choose to be anything other than what they are. We inherited two billion years of evolution from them. Dr. Leonard Peikoff claimed that transgendered individuals are irrational and anti-reality, declaring that their whims are superior to nature. (Did he say nature or "Nature"?) Rather than acting contrary to reality, they seem to be acting in accordance with it.)
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