What are some cryptic species?
Examples of cryptic species include the African elephant. A 2001 study found the elephants were actually two genetically distinct, non-interbreeding species, the African bush elephant and the African elephant. The species are currently listed as vulnerable and threatened, respectively, by the World Conservation Union.
What are Polytypic species?
Species which contain two or more sub species are called polytypic species and those, which are not divided into sub species are monotypic species.
What do you mean by sibling species?
one of two or more species that closely resemble one another but whose members cannot interbreed successfully.
What is species complexity?
In biology, a species complex is a group of closely related organisms that are so similar in appearance that the boundaries between them are often unclear.
What is a cryptic species biology?
: one of two or more morphologically indistinguishable biological groups that are incapable of interbreeding — compare physiologic race.
What is a cryptic fish?
(M. C. W. Weber, 1913) The cryptic anglerfish (Histiophryne cryptacanthus) is a frogfish found in waters ranging from Taiwan to South Australia. There are an estimated 75 specimens known. The luring appendage on its forehead is reduced to nearly nothing.
What does it mean to say that humans are a polytypic species?
Humans are a polytypic species, meaning they are composed of populations that differ in the expression of one or more traits. There is a great deal of genotypic and phenotypic variation between individuals. Traditional views of race categorized people by skin color along with head shape and size.
What is meant by super species?
Superspecies-A group of entirely or essentially allopatric taxa that were once races of a single species but which now have achieved species status. The species comprising a superspecies. have usually been called “semispecies.”
What is a semi species?
A group of organisms that are taxonomically intermediate between a race and a species, with reduced outbreeding and gene flow, i.e. with incomplete reproductive isolating mechanisms. Semi-species are thought to represent advanced stages of speciation. From: semi-species in A Dictionary of Plant Sciences »
What is complexity in biology definition?
Complexity. (Science: molecular biology) The number of different sequences of base-pairs in a particular genome.
What does complexity in evolution mean?
With selection, evolution can also produce more complex organisms. Complexity often arises in the co-evolution of hosts and pathogens, with each side developing ever more sophisticated adaptations, such as the immune system and the many techniques pathogens have developed to evade it.
What kind of fish live in the deep ocean?
10 Rare and Weird Deep Ocean Fish Deep Sea Fish Species – The sea is salty waters and very broad, so dominates most areas of the world. Goblin sharks, with the scientific name of the species Mitsukurina Owstoni is living under water. The spider crab is a crab species that live in the depths of the Sea of Japan.
How many species of fish are there in the world?
We’ve provided a look into 42 species of freshwater fish—including largemouth bass, walleye, catfish, crappie, northern pike, trout, and more! You can learn the natural history for each species as well as some cool facts. Freshwater Fish of the East and Freshwater Fish of the West posters and stickers are available to order.
What are the names of the freshwater fish in America?
Freshwater Fish of America. Alligator gar. American eel. American shad. Apache trout. Arctic grayling.
Which is the best description of a species complex?
A species complex is generally a monophyletic group – there are exceptions. A species complex instead is a broad descriptor of organisms where distinction into species is difficult due to overlapping characteristics. Cryptic species and species aggregates are merely specific types of species complexes.