Correct answer is B.
Explanation:
In their nucleus cells contain DNA. The DNA has information about size, shape and function of each cell. When the cell reaches it's full size it stops growing and starts doing whatever it's function is. If more cells are needed then the cell replicates. This explanation excludes answers A and C.
Male and female sexual cells are used to conceive a baby. These cells combine to form a new type of cells. In the first few weeks all types of cells are created. Then the creation of new types of cells stops and existing cells multiply in order to achieve needed number of cells. This explanation excludes answer D.
When we compare an adult person and a baby we can see that, for example, an adult has bigger bones than a baby. This was result of increasing number of existing types of cells without creating any new type.
Answer:
From the political map of a continent, we learn on <u>countries</u> and <u>cities</u> within such countries, especially in <u>capitol cities</u>.
Explanation:
From the political map of a continent, we learn on <u>countries</u> and <u>cities</u> within such countries, especially in <u>capitol cities</u>. In this case, we may learn from continents:
(i) The name, location and geographical extension of every country within the continent on map.
(ii) The name and location of most important city in every country within the continent on map.
The correct answer is : D. Pleistocene epoch
The Pleistocene epoch lasted from about 2,500,000 years ago to 11,700 years ago. In this era, a lot of repeated glaciations happened on earth, since most of Earth's geographical surface is covered in Ice.
Answer:
The answer would be contamination of groundwater.
Explanation:
