Scientists are concerns about the loss of species because the loss of one species can set off a chain reaction that cause other species to die out and affect out food chain.
<span>When river water is no longer flowing downhill, the water slows down. This makes sediment drop to the bottom. Sediment deposited where a river flows into an ocean or lake builds up and a landform called a delta is formed.</span>
Answer:
guanine, cytosine, cytosine,adenine,thymine,guanine
Explanation:
This is because during DNA replication the complementary base pairings are Adenine and Guanine, Thymine and Cytosine.
I have just taken the test, and the answer is in fact B.
