A DNA segment removed from neurospora

(a pink mold) contained the base sequence

G-T-C-C-A-T-G-C-A. A similar segment of

DNA removed from neurospora that had been

exposed to radiation for several hours had the

base sequence G-T-C-C-A-T. This change in the

base sequence is an example of

(1) a deletion (3) a substitution

(2) an insertion (4) a replication

1) a deletion

Explanation:

Because the remainding sequence was removed from the original.

g1

choices:

a. g2. b. g1. c. m

cell division has two checkpoints namely, g1

checkpoint and spindle assembly checkpoint. the checkpoint which determines if

division has properly occurred is the g1 checkpoint. at this point, is a damage

in the dna is detected or  the has not reach the optimum size, the cell is

stopped in g1 and is not allowed to proceed to further process.

source:

d) center of the mid-ocean ridge

give brainleysest

sinserly,

steckh986