Use the complementary rule: If we had a DNA strand of 20 nucleotides, and 6 of them were adenine, how many thymine, guanine, and cytosine would we have?
6 thymine, 4 guanine, 4 cytosine
4 thymine, 6 guanine, 4 cytosine
O 6 thymine, 6 guanine, 6 cytosine
О 4 thymine, 4 guanine, 6 cytosine
Question 16
6 pts

6 thymine, 4 guanine. 4 cytosine

Explanation:

Adenine pairs with thymine, so you need 6 of each

Cytosine matches with guanine, but the total of nucleotides is 20, so

6(adenine)+6(thymine)=12

20-12=8

8= 4(guanine)+4(cytosine)

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: