<span>Unidirectional flow in the heart is ensured because the heart contains valves that prevent backflow.
These valves keep the flow of the heart going in one direction (hence the name "unidirectional").</span>
Adenine and thymine
cytosine to guanine
hope that helped
Roots and stems
Explanation: the cork of mature roots and woody stems is perforatedby nonsuberized pores called lenticels.
The sickness can originate from her predecessors, it's as of now in her qualities. Expires don't have anything to do with races.
Race and wellbeing allude to the connection between singular wellbeing and one's race and ethnicity. Contrasts in wellbeing status, wellbeing results, future, and numerous different markers of wellbeing in various racial and ethnic gatherings is all around recorded, alluded to as wellbeing abberations. The race is an intricate idea, and the two noteworthy contending speculations of race utilize organic definitions and social development to characterize the racial distinction.
The first answer is volcanoes
The second answer is They move because of convection currents in the mantle
