Each gene pool includes various alleles of genes. The variation occurs both within and among populations, supported by individual carriers of the variant genes. Genetic variation is brought about, fundamentally, by mutation, which is a permanent change in the chemical structure of chromosomes.
Answer:
C: Leaders have absolute power
The legislative branch can `` check ‘’ the executive branch by rejecting the President`s veto of a legislative action …this is known as an override . A two third vote in each legislative chamber ( House of Representatives and Senate ) is required to override a Presidential veto .
The Senate can reject a treaty that the Executive has signed ; a two thirds vote in the Senate is required to formally enact a treaty .
The Senate must approve Executive appointments to cabinet , and the Federal Judiciary .
The ultimate check for the legislative branch is the power to impeach and remove the president . The House of Representatives acts as prosecutor , and The Senate acts as jury . The House of Representatives drafted articles of impeachment against President Richard Nixon in 1974 , but Nixon resigned the office of the presidency before he was formally impeached .
Innovation is the process of introducing new ideas or promoting change through a new idea or object. There are two main types of innovation: discovery and invention. This is a guiding principle of Americans not to settle and to remember that things can always improve or be enhanced. Through this spirit of innovation, Americans are always working to advance the fields of science, medicine, and technology.
