Define speciation
Describe briefly the term speciation?
Expert
Speciation is the procedure by which dissimilar species emerge from a common ancestor species. Speciation usually begins when populations of similar species become geographically isolated, that is, when they are separated by the some physical barrier that prohibits crossing between individuals from one population and individuals of any other population.
Groups that for a extensive time are kept under geographical isolation tend to accumulate different phenotypical characteristics from each other by means of genetic variability (mutations and recombination) and natural selection. When those differences reach a point that makes the crossing of individuals of one group with individuals of the other group impossible or the generation of fertile offspring no longer happens it is said that speciation has occurred.
Of which substance do elastic fibers of connective tissue are made? Write down the some functions of these fibers?
Explain the term Sperm. Also describes its structures with the help of diagram.
Which valve separates stomach from the oesophagus? Specify its function?
What do you mean by immunolabeling?
What are the Objectives of Advertising? And why objectives of advertising is a crucial step in developing the advertisement program?
Describe possible knowledge-based (probably requiring training or other instruction) that may be indicated.
What is the purpose of the umbilical cord?
Write about the various flight adaptations exhibited by the birds?
SARS is a disease which appeared in the year 2003 with epidemic features in the province of Guangdong, in east China. What kind of agent causes the SARS?
Explain the signs and symptoms found among patients with hypothyroidism?
18,76,764
1925276 Asked
3,689
Active Tutors
1413988
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!