Key points: The mechanism that Darwin proposed for evolution is natural selection. Because resources are limited in nature, organisms with heritable traits that favor survival and reproduction will tend to leave more offspring than their peers, causing the traits to increase in frequency over generations.
Q. What would have resulted from the functions of prokaryotes on early Earth?
The most appropriate answer would be option D. The first life appeared on earth was probably the prokaryotes. Some of them called cyanobacteria discovered the process of harnessing energy from the sun, that is, photosynthesis. The oxygen was released as the byproduct of the process.
Table of Contents
- Q. What would have resulted from the functions of prokaryotes on early Earth?
- Q. Which factor is used as evidence in supporting the idea that life changes over time?
- Q. Which organisms will survive and reproduce?
- Q. What factors may cause a struggle to survive among members of a population?
- Q. What is survival of the fittest in natural selection?
- Q. What is genetic drift caused by?
- Q. What is genetic drift and how does it develop?
Q. Which factor is used as evidence in supporting the idea that life changes over time?
One of the main evidence for both evolution and the idea life changes is the existence of homologous structures that refer to structures such as bones or organs organisms of different species or types share and that show they had a common ancestor and due to changes in live new organisms appear.
Q. Which organisms will survive and reproduce?
According to Charles Darwin’s theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.
Q. What factors may cause a struggle to survive among members of a population?
Individuals produce more offspring than their environment can support, and some die because of factors such as predation, food shortage or disease. These factors are known as environmental selection pressures and they determine which individuals will do best at surviving and reproducing.
Q. What is survival of the fittest in natural selection?
“Survival of the fittest” is a popular term that refers to the process of natural selection, a mechanism that drives evolutionary change. Natural selection works by giving individuals who are better adapted to a given set of environmental conditions an advantage over those that are not as well adapted.
Q. What is genetic drift caused by?
Genetic drift is a random process that can lead to large changes in populations over a short period of time. Random drift is caused by recurring small population sizes, severe reductions in population size called “bottlenecks” and founder events where a new population starts from a small number of individuals.
Q. What is genetic drift and how does it develop?
Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error). Genetic drift may result in the loss of some alleles (including beneficial ones) and the fixation, or rise to 100% frequency, of other alleles.
