Only land animals can leave traces - the first animals were too big to preserve d question 4 0.34 pts an animel o must live on land o is a single-celled organism was the first form of life on the earth ois a prokaryote o has specialized cells d question 5 0.33 pts what was one evolutionary advantage that conifers had over seed ferns? greater tolerance to cold conifers are single-celled organisms ability to grow on land conifers have flowers and fruit ability to photosynthesize d | question 6 0.33 pts why are fossils from the beginning of the phanerozoic eon easier to find than fossils from the proterozoic eon? life on earth only appeared in the phanerozoic fossils can only happen to land animals, which only appeared in the phanerozoic no rocks from the protozeroic eon are currently present on earth there were only prokaryotes before the phanerozoic many organisms started to have skeletons, shells, rigid coats and other hard parts in the phanerozoic but not in the protozeroic question 7

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.