If you wanted to try and identify or classify archaea or eubacteria, you would study their habitat, study their genetic make-up, study their shape and arrangement, conduct Gram staining, study how they gain energy and nutrients and study how they move. Archaea and eubacteria are genetically different; Archaea have more complex RNA polymerases that contain multiple polypeptides while eubacteria have simple RNA polymerases that contain four polypeptides. Archaea cell walls do not contain peptidoglycan while almost all bacteria cell walls contain peptidoglycan.
the answer is D. it shows how the population changed because the shorter legged animals survived and continued the population while the long legged animals died away.
Natural selection occurs when there is variation within a species, inheritance of the variations, and a limit on resources. This leads to individuals with advantageous traits having a higher chance of survival and reproduction. The best example given was a population of mammals that evolved to have shorter legs due to a change in their habitat.
Natural selection is a crucial mechanism of evolution and it occurs when three conditions are present: variation within a species, inheritance of those variations, and a population limitation on resources consumed. This leads to a survival competition, where advantageous traits increase an individual's chances of survival and reproduction, thus passing these traits onto the offspring.
In the given options, the description that fits most closely with natural selection is: 'D. A population of mammals varies in the length of their legs, water levels rise and the habitat becomes swampy, the individuals with shorter legs are better able to swim to food, the population evolves to become shorter-legged'. This example demonstrates genetic variation (the different leg lengths), selection pressure (the change in habitat), and selection advantage (shorter legs being more suitable for the new conditions).
#SPJ3
b. essential.
c. facilitated.
d. inorganic.