4. To determine the frequency of ala mutants a fluctuation test was done using 30 tubes with a final concentration of 108 bacteria each. From
each tube 0.1 ml of culture was plated on medium that selects for ala
mutants. 27 of the tubes yielded ala mutants but 3 of the tubes yielded
no mutants. Based upon these results, use the Luria-Delbruck
calculation to determine the mutation rate to ala.

dogs is better and probably lizards.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

feral cats are estimated to eat tens of millions of native animals each night in australia

i believe your answer would be c.. : )