Answer:Benefit of comparative investigation is that we can get descrete information about specific breed or species.
Limitation of comparative investigation is that when it is done on a huge population, huge amount cost is required.
Explanation:Benefit of comparative investigation is that we can get descrete information about specific breed or species. It is important for the study of behaviour of many organisms. The working and behaviour of various natural aspects can be found.
Many natural phenomenon has been found by this method. Some are discovered. it helps a lot in the development of science and technology. In this method, results are very accurate.
Limitation of comparative investigation is that when it is done on a huge population, huge amount cost is required. Example, whhen it is done on humans. There population is around 7.3 billion in planet earth. So, this task require a huge amount of money and time as compared with other methods.
The statement that would best keep the world's oxygen supply from decreasing:
a.Planting trees in forests that have been harmed
Trees decrease the urban heat island effect via evaporation cooling and lessening the amount of sunlight that reaches parking lots and buildings.
Answer: c.they all use heat to turn water to steam to turn a turbine
Explanation:
The correct answer would be D. Mollusca.
The question is basically describing a snail.
Arthropoda have segmented bodies.
Echinodermata(starfishes, sand dollars etc.) are radially symmetrical.
Also none of them have shells except phylum Mollusca :)
