secondary sexual structures
31Insect evolution — The relationships of insects to other animal groups remain unclear. Although more traditionally grouped with millipedes and centipedes, evidence has emerged favouring closer evolutionary ties with the crustaceans. In the Pancrustacea theory,… …
32Mild androgen insensitivity syndrome — Classification and external resources AIS results when the function of the androgen receptor (AR) is impaired. The AR protein (pictured) mediates the effects of androgens in the human body. ICD 10 E …
33Insect wing — Original veins and wing posture of a dragonfly. Hoverflies hovering to mate …
34Nipple — This article is about the anatomical structure. For other uses, see nipple (disambiguation). Nipple A nipple, areola and breast of the human female …
35Turner syndrome — or Ullrich Turner syndrome encompasses several conditions, of which monosomy X is the most common. It is a chromosomal disorder affecting females in which all or part of one of the X chromosomes is absent. Occurring in 1 out of every 2500 girls,… …
36Mating — Dragonflies mating Tortoises mating …
37Mate Choice — is the process in which one organism chooses another one to mate with. The overall reason for mate choice in any species is to pick a mate that can provide better genetic material that will produce more fit offspring that are more likely to… …
38Timeline of zoology — A preliminary timeline of the history of zoology before the 1859 publication of Darwin s Origin of Species . Ancient world *28000 BC. Cave painting (e.g. Chauvet cave [http://www.culture.gouv.fr/culture/arcnat/lascaux/en/] ) in Europe, especially …
39arachnid — arachnidan /euh rak ni deuhn/, adj., n. /euh rak nid/, n. 1. any wingless, carnivorous arthropod of the class Arachnida, including spiders, scorpions, mites, ticks, and daddy longlegs, having a body divided into two parts, the cephalothorax and… …
40Lactation — Kittens nursing Lactation of …
