selective species
81disease — diseasedly, adv. diseasedness, n. /di zeez /, n., v., diseased, diseasing. n. 1. a disordered or incorrectly functioning organ, part, structure, or system of the body resulting from the effect of genetic or developmental errors, infection,… …
82Evolution of biological complexity — Part of the Biology series on Evolution Mechanisms and processes Adaptation Genetic drift Gene flow Mutation Selection Speciation …
83Domoic acid — Identifiers CAS number 14277 97 5 …
84Domestication of the horse — A bred back Heck Horse, closely resembling the Tarpan (photographed 2004), believed to be phenotypically close to the wild horse at the time of its original domestication. There are a number of hypotheses on many of the key issues regarding the… …
85Multiple birth — Quadruplet , quintuplet , etc. redirect here. For the musical use of the terms, see tuplet. Triplet brothers at graduation. Identical triplets are extremely rare, something that occurs only once in every 500,000 births. A multiple birth occurs… …
86Fancy rat — This article is about pet brown rats. For pet Gambian pouched rats, see Gambian pouched rat. For pet black rats, see Black rat. A common hooded fancy rat The fancy rat is a domesticated brown rat (Rattus norvegicus), which is the most common type …
87History of zoology (through 1859) — This article considers the history of zoology before the theory of evolution proposed by Charles Darwin in 1859.Pre scientific zoologyHumans have been fascinated by the other members of the animal kingdom throughout history. In early Europe, they …
88Melatonin — Not to be confused with Melanin or Melanotan. Melatonin Systematic (IUPAC) name …
89Sex ratio — is the ratio of males to females in a population. The primary sex ratio is the ratio at the time of conception, secondary sex ratio is the ratio at time of birth, and tertiary sex ratio is the ratio of mature organisms. [Nancy S. Coney and W. C.… …
90Monoicous — Not to be confused with Monoecious. Monoicous is a botanical term used to describe plants which bear both sperm and eggs on the same gametophyte. Dioicous is the complementary term describing species in which gametophytes produce only sperm or… …
