Answer: Weathering constantly changes the earth's surface by wearing away exposed surfaces, smoothing rough areas of rocks and causing rock materials to break down in time. Weathering creates soil and happens due to ice, wind, water, salt, acids and changes in temperature Gravity shapes the Earth's surface by moving weathered material from a higher place to a lower one.
Answer:
One easy way to measure the "size" of a ball is how far it is from side to side. Your tennis ball example is a good one: a typical tennis ball is about 2.5 inches form side to side.
<span> I would have to say that Homologous chromosomes are made up of chromosome pairs of approximately the same length, centromere position, and staining pattern, for genes with the same corresponding loci that's all I know</span>
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The answer is 2/3, the average adult human body is composed of 60% water.
Answer:
RBC burst when placed in pure water , Ans C -The water rushes into the cell. Cell swells and burst.
Explanation:
This can be understand by understanding OSMOSIS
Movement of water molecule from its higher concentration to its lower concentration through a semipermeable membrane is called OSMOSIS.
If cell is placed in any solution in which solute concentration is higher than inside the cell (HYPERTONIC SOLUTION), means water content in cell is higher then outside environment. Then the water molecule will flow from cell to the outer medium. Water molecule movement continues till concentration of solutes reaches same both in cell as well as in medium.
IF cell is placed in any solution having solute concentration lower than inside the cell. In this solution water content will be higher and solute concentration will be low (HYPOTONIC SOLUTION). Water movement will be inside the cell from the outer environment.<u><em> As the result Cell swells and ultimately burst because of excess water content.</em></u>
IF cell is placed in ISOTONIC SOLUTION, where concentration is same both in cell and outer environment, No movement of water molecules takes place.
