Answer:
Different from one another.
Explanation:
Both rocks are different from one another because one rock is formed from small pieces of rock while the other is made of liquid rock. Due to formation from different types of materials both rocks are different from one another. If both rocks are formed from small pieces of rock or liquid rock, then we can say that both rocks are similar to each other in composition.
The answer is A: Collagen
Pulmonary alveolus is the answer.
The source of variations is mutation.
Option (a);
<u>EXPLANATION: </u>
Mutation can create a completely different allele of species and this means that the new version of genes will be created with the mutation. Genetic variation refers to the difference in genes within a population.
An organism's DNA decides how that particular species looks or behaves. With the help of mutation, DNA of that organism is affected, thereby creating a different species altogether.
It is an important source of evolution as it affects the way that the body develops or works.
