i aint ever seen two pretty best friends etleast one of em gotta be ugly. Have u seen two pretty best friends? have anyone of u ever thought if there both pretty are they rly best friends

Amutagen is 1: a living thing that has undergone a mutation. 2: an agent that causes a mutation in dna. 3: a mutation that has affected one gene. 4: a chemical that can poison living cells.

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons