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The Dryad by Evelyn De Morgan. A dryad (/ ˈ d r aɪ. æ d /; Greek: Δρυάδες, sing. Δρυάς) is an oak tree nymph or oak tree spirit in Greek mythology; Drys (δρῦς) means "tree", and more specifically "oak" in Greek. [1] Today the term is often used to refer to tree nymphs in general. [2]
A gynandromorph can have bilateral symmetry—one side female and one side male. [24] Alternatively, the distribution of male and female tissue can be more haphazard. Bilateral gynandromorphy arises very early in development, typically when the organism has between 8 and 64 cells. [25] Later stages produce a more random pattern. [citation needed]
The wingspan is 54–70 millimetres (2.1–2.8 in). [4] The basic color of the upperside of the wings is dark brown. The females are larger and paler than the males. On each forewing there are two large eyelets with bluish pupils, while in each hindwing there is just a small eyelet.
The female's body size must remain small because in order for her to breed, she must lay her eggs inside the empty shells. If she grows too large, she will not fit in the shells and will be unable to breed. The female's small body size is also likely beneficial to her chances of finding an unoccupied shell.
[3] [4] Some maintain that a Hamadryad is the tree itself, with a normal dryad being simply the indwelling entity, or spirit, of the tree. If the tree should die, the Hamadryad associated with it would die as well. For this reason, both dryads and the other gods would punish mortals who harmed trees.
Sexual dimorphism can manifest itself in many different forms. In male and female primates there are obvious physical difference such as body size or canine size. Dimorphism can also be seen in skeletal features such as the shape of the pelvis or the robustness of the skeleton. [3] There are two mating systems in the sexual selection of primates.
Manticore – Creature with a man's head, a lion's body, bat wings, and a scorpion tail. Mermaid, merman – Women and men with the lower bodies of fish. Minotaur – (Greek) A human with the head and sometimes legs of a bull. Moirai – Lesser trio of female deities assigned with deciding and weaving the fates of humans. Usually called the ...
Sexual differentiation is the process of development of the sex differences between males and females from an undifferentiated zygote. [1] [2] Sex determination is often distinct from sex differentiation; sex determination is the designation for the development stage towards either male or female, while sex differentiation is the pathway towards the development of the phenotype.