Answer:
a) two/ darwinian and mass
B. Thymine have the same percentage as adenine and Cytosine and guanine have 28%, which combined together you get 100%
Darwin strongly believed that all organisms have common ancestors.
--joeranja123ever
Social factors affect the overall survival of the bird.The amount of food an offspring get from the bird (in this case the mother), it determines the weight gain of the offspring, as well as the development of different skills and also its survival.