In order to find out the fertility rate (the average number of children born in a area in a women's lifetime) of a group, you have to know the population of women and newborn children.
The proteins on the surface of the virus change quickly and in shape
Answer: Option C.
Polar type of temperate climate over land and subtropical seasonable variable climate zone between 40 to 60 degrees latitude, north or south of the equator.
Explanation:
The temperate zone is the area of the Earth that is between the tropical region and the polar region. It is between the Artic circle and tropic of cancer or between the Antartic circle and tropic of Capricorn. The have between 40 to 60 degrees latitude north or south of the equator. They have seasonal changes. The climate is mild ranging from cool to warm and the sun is not overhead. The zone have four annual seasons and they are Autumn, wintery, spring and summer.
Examples of this regions are western Europe and Northern America.