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Weegy: Natural selection is the gradual process by which biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment. User: A cladogram is a diagram used to represent a hypothetical relationship between groups of animals, called a phylogeny. A cladogram is used by a scientist studying phylogenetic systematics to visualize the groups of organisms being compared, how they are related, and their most common ancestors. (More)

Weegy: A remarkable fact about cells is that cells are very different but have similar properties. User: Viruses can only be studied in detail using a(n) _____. (More)

Weegy: The organic substance making up the cells of all living things is: protoplasm. User: Which of the following is not correct? All cells _____. (More)

Weegy: Artificially stimulating antibodies to a disease is called Immunization. User: At what ages do health official recommend following an immunization schedule? Weegy: At birth-75 years do health official recommend following an immunization schedule. User: It is difficult to determine a definition for life that is suitable for all situations. Instead of defining life, biologists have decided to _____. Weegy: It is difficult to determine a definition for life that is suitable for all situations. Instead of defining life, biologists have decided to describe the characteristics of life. User: If something exhibits all of the characteristics of life, it is considered to be _____. (More)