What is the overall tone of this excerpt from "when we two parted" by lord byron?
a. somber
b. distressful
c. bittersweet
d. joyful

I have found the excerpt for this question from another source. I will paste it here:

They name thee before me,
A knell to mine ear;
A shudder comes o'er me—
Why wert thou so dear?
They know not I knew thee,
Who knew thee too well:--
Long, long shall I rue thee,
Too deeply to tell.
In secret we met—
In silence I grieve,
That thy heart could forget,
Thy spirit deceive.
If I should meet thee
After long years,
How should I greet thee!--
With silence and tears.

That excerpt from Lord Byron's "When We Two Parted" expresses the narrator's intense sadness from the loss of his love. The poem expresses the bitter pain that comes from the loss, but also the sweetness that comes from the narrator's expectation that they will meet again.

The lines "After long years,/ How should I greet thee!--/ With silence and tears." illustrates the tone of the poem well. There is a bittersweet mood with how he deals with the departure of his love.

ANSWER: C. bittersweet

Okay, biology isn't exactly my strongest subject (it never has been), but i'm pretty sure the answer is nucleotides. dna is made up of nucleotides. each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. there are four different nitrogen bases: adenine (a), thymine (t), guanine (g), and cytosine (c). a always pairs with t, and g always pairs with c.