Answer:
Darwin proposed the theory of natural selection to explain the process of evolution. According to Darwin’s theory of natural selection, all organisms have the potential to reproduce limitlessly irrespective of the fact that each species maintain a constant density over time. However, the struggle for existence, i.e. the competition among individuals for available resources to survive and reproduce, put a check on species density (D) and maintains it at a constant level (B). Survival of fittest is unequal ability of individuals to survive and reproduce based on suitability of their inherited characters to prevailing environmental conditions (A). It imparts the reproductive advantage to certain organisms which account for major part of the gene pool of the species. Thus, natural selection favors the individual with survival and/or reproductive advantage over others under existing environmental condition (E). Thus, the correct answer is option C.
Answer:
Your body will always try to keep you at the same temperature, for example, even when it's raining. Asthma is a good example of homeostasis gone wrong and the body acts out of proportion to a stimulus starting a process that leads to symptoms.
Answer:
The correct answer is - The cell walls of archaea lack peptidoglycan.
Explanation:
Archaea are the prokaryotes that are different from bacteria in various ways but the most important differences are the membrane lipids and the major component of the cell wall that lacks peptidoglycan found in the cell wall of bacteria.
These prokaryotes are able to use carbon dioxide to oxidize hydrogen, releasing methane. Archaea-like prokaryotes have a high level or complex genetic diversity.
Animal cells have centrioles and plant cells don't have this.Animal cells divide everywhere and all the time but plant cells divide in a specialized region called the meristems.
<u>Explanation:</u>
The mitotic cell division occurs in both plants and animal cells. The process involved in the formation daughter cells in cytokinesis stage makes the difference between animal and plant cell division. The animal cells forms a furrow and the daughters cells forms in the cytokinesis stage. The plant cells will not form furrow since their cells are rigid.
Centrioles are present in animal cells. centrioles are absent in plant cells. The cell division occurs at every place and any time in an animal cell. In plant cell the division occurs only in meristems which is a specialized region in plant cells.
