Answer: scientific theory is an explanation of observations or events that is based on knowledge gained from many observations or events.
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The fish did not yet exist when the old layers of rocks were deposited. In fact, animals with hard parts did not evolve until about 600 million years ago, which is only about 13% of the 4.5 billion year age of the Earth. Multicellular animals without hard parts left tracks in older sediments, but had no fossilize-able body parts.
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after the oocyte- estrogen levels consistently rise
Mature egg- the progesterone levels are high
Between the ovary and corpus lutem- luteinizing hormone levels are high
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The sugar and phosphate group make up the backbone of the DNA double helix, while the bases are located in the middle.
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i beleive that is the respiratory system but ill double check in a m inute
alright heres all your answers for that test question 1 true
question 2 oxygen question 3 carbon dioxide question 4 true question 5 alvoei question 6 diaphram question 7 respitory system the last 3 are all true i hope i helped
