The youngest would be the ones at the top and the oldest would be at the bottom. the oldest is B and the ones around it, as they get bigger get younger. hope this helps :)
Answer:
Germ cell DNA
Explanation:
mutations that are present in other body cells do not get passed onto offspring. if the mutations are present in a germ cell it does get passed onto offspring
Answer: b. They can live away from water
Explanation:
The frogs are the amphibian organisms, which are capable of survival both in water as well as land. In frogs external fertilization is used as a mode of sexual reproduction. The females lay their eggs in water in the same time the males also secrete their sperms in the water. The eggs are fertilized by the sperms in water. For reproduction the frogs are dependent on water. But with the evolution of frogs, which allows them to fertilize the eggs on the land. The frogs can live away from water.
Mechanisms of gene regulation include: Regulating the rate of transcription. ... Regulating the processing of RNA molecules, including alternative splicing to produce more than one protein product from a single gene. Regulating the stability of mRNA molecules.
