D is the answer. A gene is a part of a chromosome.
Eccentricity of a body following an elliptical orbit defines how nearly circular the path of the object is. When the eccentricity of an orbiting body increases, it means that the body is moving in the most stretched out path.
Answer: If you break the two terms down, "intraspecific" just means within a species, while "interspecific" means between them. Consequently, interspecific competition is all about competition between two or more species, while intraspecific competition involves different individuals of the same species.
Great question
Examples of a scientific theory
Scientific theories are testable and make falsifiable predictions. They describe the causes of a particular natural phenomenon and are used to explain and predict aspects of the physical universe or specific areas of inquiry (for example, electricity, chemistry, and astronomy).
What molecule??
I'm assuming the answer would be by diffusion.