Answer:
According to Darwin's theory of evolution, new species evolved as a result of natural selection.
Explanation:
- Darwin proposed that speciation could readily occur through the prolonged action of Natural selection.
- Natural selection allows the 'survival of the fittest' i.e. a more fit organism will have a better chance of survival than the less fit one.
- The result of Natural selection could be positive,negative or balancing.
- Evolutionary process in which the genetic changes confer a higher fitness to increase frequency of the organism over time in population is called positive selection.
- Evolutionary process in which genetic changes decreases the organism's fitness resulting in its disappearance from the population is called Negative selection.
- It may happen that a mutation benefits hetero-zygotes but not homo-zygotes and alleles maintain a intermediate frequency in population.This evolutionary process is called balancing selection.
<span>The period of growth in between cell divisions is called . The cell cycle is the series of phases a cell goes through as it grows and divides. The division of the cell nucleus during the M phase of the cell cycle is called . During the G1 phase cells mostly grow.</span>
Yeast cells such as Saccharomyces pombe performs asexual reproduction or the formation of daughter cells through fission. Fission involves dividing the mother cell into daughter cells through division of its cell wall, then its nuclear materials
Answer:
The circulatory system, also known as the cardiovascular system, is a simple loop which starts, and ends, with your heart. It is a closed system, meaning blood does not enter or leave the system during its journey from your heart to your body and back again.
Explanation:
