Continued The internal reproductive organs in the female include: Reproductive benefits arise in the form of a larger number of offspring, while natural selection imposes costs in the form of reduced survival. Another example is the dragonet , in which males are considerably larger than females and possess longer fins. Migratory patterns and behaviors also influence sexual dimorphisms. The remaining genitalia were then reconstructed to resemble those of the chosen sex. It has been shown that the larger males are better at coping with the difficulties of migration and thusly are more successful in reproducing when reaching the breeding destination. The courtship and mating behavior of males and females are regulated largely by hormones throughout a bird's lifetime.
The Hamadryas baboon, for instance, a native of the Horn of Africa, has an erect penis that is five and half inches long — slightly shorter than an average human male, but they weigh only a third of our weight. The uterus is divided into two parts: Primates with simpler penises tend to be monogamous like cotton top tamarins a or polygynous like gorillas g. Such differences in form and reproductive roles often cause differences in behavior. Sexual dimorphism also occurs in hermaphroditic fish. Females of the aquatic plant Vallisneria americana have floating flowers attached by a long flower stalk that are fertilized if they contact one of the thousands of free floating flowers released by a male. See Article History Alternative Title: The populations are generally changing sex at a smaller size, due to natural selection. Mating with a partner is more desirable biologically, as the genetic material of the resultant offspring is varied, but if mating with a partner is not possible, self-fertilization is practiced. In the size dimorphic wolf spider , food-limited females cannibalize more frequently. Reproductive system of gastropods: The ovaries produce eggs and hormones. Essentially, male chimps have sex all the time with any female and with any excuse. If a substantial amount of wiggling fails to separate them, the male organ will be bitten off using the slug's radula , see apophallation. With little or no competition actually inside the uterus, gorillas have had no need for a testicular arms race to facilitate the production of more and more sperm. Continued The internal reproductive organs in the female include: For example, sexual dimorphism in coloration increases the vulnerability of bird species to predation by European sparrowhawks in Denmark. Sexual differentiation was studied. In this fish, the males are characterized as being up to 60 times larger than the females. Later in life, for example, the person may not be satisfied with the results of surgery and may not identify with the assigned gender. Banana slugs are one example of a hermaphroditic gastropod. Ghiselin  which states that if an individual of a certain sex could significantly increase its reproductive success after reaching a certain size, it would be to their advantage to switch to that sex. Chimps have huge testicles for their size. Any remaining eggs gradually die out at menopause. Other kinds of intersex conditions are identified immediately at birth because those with the condition have a sexual organ larger than a clitoris and smaller than a penis. If a banana slug has lost its male sexual organ, it can still mate as a female, making its hermaphroditic quality a valuable adaptation. Treatment of intersex in humans depends upon the age at which the diagnosis is made.
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The Female Sex: Women and Females (Part 1) - Planet Doc
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