<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>
Answer:
C. 2 and 4 are correct
Explanation:
Institutional review board protects the rights of human research.
They are involved with reviewing of all research that involves the use of humans before it is conducted and protect the welfare of the human involve and the privacy.
The member of the board must be 5 and above and it include people from different fields that are knowledgeable and will provide findings on human research. A non scientist is also involve and someone from other field.
2 and 4 is correct
Answer:
Two cell divisions after DNA replication
Explanation:
After the DNA is replicated, the cell undergoes two rounds of meiosis to produce 4 cells, each wIth 23 chromosomes. This is how the cell goes from a diploid to a haploid state.
Yes it is true because after many years of water or wind eroding away at the rock will cause it to break up into tiny pieces
