Use this portion of a dichotomous key for tree identification to answer the question.

1a. needlelike leaf ® step 10
1b. broad leaf ® step 2
2a. compound leaf ® step 3
2b. simple leaf ® step 7
7a. leaf bases attached opposite each other on branch ® step 8
7b. leaf bases attached staggered on branch ® step 11
8a. leaves lobed ® maple
8b. leaves not lobed ® step 9
9a. leaves heart shaped ® catalpa
9b. leaves not heart shaped ® dogwood

which best describes dogwood leaves?
they are lobed, simple leaves and are attached staggered on the branch.
they are not heart shaped and are attached staggered on the branch.
they are compound, broad leaves and are attached oppositely on the branch.
they are nonlobed, simple leaves and are attached oppositely on the branch.

D) They are nonlobed, simple leaves and are attached oppositely on the branch.

Explanation:

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.

actually the answer is c