6.

(a) Which mixture(s) at home can be separated by the separation technique?
A. Tea brewed with fresh Chinese tea leaves
B. Homemade barley drink with barley seeds
C. Fruit pulps in fruit juice
D. All of the above

the answer is D. All of the above

Explanation:

Seperation technique is used to separate undisolved solid particle from liquid.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.