Answer:
Fossil records provide evidence of an increase in animal species at the same time that atmospheric oxygen levels increased.
Explanation:
A huge diversification among animal species occurred with the increase in the levels of atmospheric oxygen. The reason why the number of species increased drastically was that a whole new world opened up, the land. The land was open for exploitation and taking over, with every single niche free, so animals diversified and filled in pretty much all of the niches. The fossil records give us clues when this happened, as from only microorganisms there is a sharp rise in complex animals, coinciding with the increase of oxygen levels.
If it wasn't for the increase of atmospheric oxygen though this wouldn't have been possible. The oxygen in the atmosphere enabled animals to breathe on land. Also, it cooled off the global temperatures which were too high before the increase of atmospheric oxygen, making them suitable for life. And last but not least, the atmospheric oxygen resulted in the formation of the ozone layer, a layer that started to act as protection from the UV rays.
The correct option is: THE ONSET OF NIPPLE GROWTH.
Puberty stage is the stage at which the chemical process which are occurring in a child's body activate the sexual capacity of that child. The signs of puberty in girls include: breast development, skin and hair changes, growth of hair in some part of the body, body growth, etc.
Answer:
The body's cells use oxygen for metabolism, and this process creates the waste product carbon dioxide. With the help of the lymphatic and circulatory systems, the skeletal system works with the respiratory system by creating red blood cells in the bones that aid in respiration facilitated by the lungs.
A. The city receives direct sunlight all over the year since it is in tropical zone (less than 30 degrees in latitude). The solar intensity will not cause a significant difference in temperature since the solar intensity itself does not vary significantly.
<span>d. The decrease in ozone will increase solar intensity and the amount of ultra-violet rays. It may lead to a higher chance of sunburn. People may also have skin cancer because of ultra-violet.
I dont really know b and c neither.</span>
The correct answer would be 4 I believe
