Which statement is true about the nitrogen bases in DNA and RNA? A. Uracil is found in RNA only. Thymine is found in DNA only.
B. Thymine is found in RNA only. Uracil is found in DNA only.
C. Uracil is found in RNA only. Guanine is found in DNA only.
D. Adenine is found in RNA only. Thymine is found in DNA only.

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.

What is used to keep track of the gamates and possible offsprings combination