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Large size is often competitively advantageous but unobtainable by many animals because of constraints of basic body plan. Intrinsically small animals sometimes become large in the same way that protozoans evolved into metazoans: The most widely recognized forms of social behaviour, however, involve interaction within aggregations or groups of individuals. Social behaviours, their adaptive value, and their underlying mechanisms are of primary interest to scientists in the fields of animal behaviour , behavioral ecology, evolutionary psychology , and biological anthropology. Biologists no longer believe that cooperative behaviours necessarily evolve for the good of the species.
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Animal social behaviour

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CRISPR - Wikipedia

The organization of the repeats was unusual because repeated sequences are typically arranged consecutively along DNA. The function of the interrupted clustered repeats was not known at the time. In , researchers of Mycobacterium tuberculosis in the Netherlands published two articles about a cluster of interrupted direct repeats DR in this bacterium. These researchers recognized the diversity of the DR-intervening sequences among different strains of M.
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Explore and learn about human female genitalia. Female genitals are the external portion of the female reproductive organ, which can be seen by the naked eye. Contained within the vulva are the mons pubis, clitoral hood, clitoris, labia majora, and labia minora, vestibule of the vagina, urethra, vaginal orifice, fourchette and perineum. Learn through the images provided as for proper location of the various parts, which compose the human female genitals and the vagina also. The human vagina is an internal organ, which has its access through the vestibule of the vagina.
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There are about 20 families of lizards, ranging from the chameleon, a divergent type, to the gecko, certain species of which have the most highly developed ears found in the group. The chameleons, of those species studied thus far, have only a… General features Lizards are by far the most diverse group of modern reptiles in body shape and size. They range from 2 cm 0. The weight of adult lizards ranges from less than 0.
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