Mutations cause Genetic variation which creates new alleles in a population.
+random mating
+random fertilization
B. Science can answer only questions about the natural world.
Answer:
Organs
Explanation:
Tissues are groups of similar cells that have a common function. An organ is a structure that is composed of at least two or more tissue types and performs a specific set of functions for the body. Many organs working together to accomplish a common purpose is called an organ system.
