What might be a symptom of a person whose vein valves are not functioning properly and are causing fluid to flow away from the heart?

A. fever
B. constricted veins
C. swollen veins
D. confusion

Genetic diversity is the variation in the genes of an entire species. each circle represents a population of a particular species in different habitats. select the population with maximum genetic diversity

Nucleic acid certain protein cell membranes certain carbohydrates

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.