Which of these conditions are always true of populations evolving due to natural selection? condition 1: the population must vary in traits that are heritable. condition 2: some heritable traits must increase reproductive success. condition 3: individuals pass on all traits they acquire during their lifetime.

Condition 1: The population must vary in traits that are heritable.

Condition 3: Individuals pass on all traits they acquire during their lifetime.

Explanation:

Charles Darwin proposed an explanation for the mechanism of evolution in contrast to Larmack's theory. Darwin put forward his explanation based on a concept called "natural selection". The theory main features include:

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.