A. He should add shells that are different colors, but the same size and type, to the tank and observe which shells the hermit crabs choose.
Durning an experiment you need to keep everything the same but only change the certain things based on your theory.
Such as how the student wanted to see if the color attracted the crab. If he had changed the size and type of the shell then the crab would have chosen the bigger one as they tend to grow into larger shells.
Answer:
Accumulation flooding occurs because the ground is completely filled with water and there is no longer a zone of dry land.
Explanation:
Flood is the overflow of water on the land which is usually dry throughout the year. It occurs when more water comes in the river due to rainfall or breaking of dam. But mostly flood occurs, due to melting of ice on the poles because of global warming. Global warming refers to the increase in average temperature due to presence of greenhouse gases such as carbondioxode, methane and water vapors etc in the atmosphere.
<h2>
<em>Merit-Ptah
</em></h2>
<em>Ancient history. The involvement of women in the field of medicine has been recorded in several early civilizations. An ancient Egyptian physician, Merit-Ptah ( c. 2700 BC), described in an inscription as "chief physician", is the earliest known female scientist named in the history of science.</em>
This is an example of Human Genome Project. It was a global logical research extend with the objective of deciding the arrangement of nucleotide base matches that make up human DNA, and of recognizing and mapping the greater part of the qualities of the human genome from both a physical and a practical point of view.
