Plants need nitrogen in order to grow. Nitrogen is abundant in the earth's atmosphere, but plants cannot use it in that particular form (nitrogen gas). Certain bacteria which reside on some plant roots are able to change atmospheric nitrogen into a form that plants can use (ammonia).
If the birth rate in a population is 40, and the death rate in that population is 15, then the population will be experiencing growth. The growth will be 25 on every 1,000 people. If this trend continues for longer period, then the population will start to become younger and younger, making the basis of the population pyramid wider, while the top part of it smaller and smaller. This demographic situation in modern times seems to be present only in the less developed countries, with the majority of the transitioning countries having much decreased population growth, and the more developed countries having more deaths than births, thus being aging populations.
Explanation:
it is unique in being the only human bone that is not attached by joints to any other bone, but is suspended in the neck by muscles and ligaments alone.
The first one is epidermis, the second one is the dermis i believe, I hope this helps
The onset of puberty and the onset of menopause are examples of <u>b</u><span><u>iological</u> </span>age.
Hope I helped!