What are two very basic concepts of evolutionary theory?

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.

When ash and dust begin to settle on the ground, they eventually become compacted by