compound consisting of a nucleoside linked to a phosphate group. Nucleotides form the basic structural unit of nucleic acids such as DNA.
Answer:
Option D, Contemporary families
Explanation:
In a contemporary societies , families become part of social change and they also try to change with time. They adopt all the changes that are intended towards the growth and advancement of the educational and professional standards so that the overall impact on the family and its function increase,
These families take the overall responsibility of upbringing of children inclusive of their sexual and marriage life. These families have a better standard of living and thus they are able to dedicate more love, care and attention to their children
Hence, option D is correct
Earth's crust is relatively thin, just 40-kilometers (25-miles) deep. Earth's crust can be divided into two types: continental and oceanic
The half life of Uranium-238 is about 4.5 billion years.
Amount after:
4.5 billion years = 200 atoms
9 billion years = 100 atoms
13.5 billion years = 50 atoms