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Primary pulmonary hypertension is most common in

A cardiac enzyme that can be detected within eight hours after a myocardial infarction and persists for several days is

Which of these is an example of a density-dependent factor?

The competitive exclusion principle states that:

A population is defined as a group of individuals of the same species living in the same area at the same time.

Evolution implies that organisms will always evolve towards greater perfection.

Convergent evolution results in organisms that are closely related but look different due to different environments.

A scientific theory, like evolution, 

The Linnaean classification system uses binomial nomenclature to name species.

Homologous structures in different species suggest