Answer:the valves prevents the backward flow of blood
Explanation:
How do cells acquire homologous chromosome pairs that carry the alleles that are independently assorted? answer: Fusion of gametes.
<h3>Duplication requires the separation of complementary DNA strands to allow for DNA replication. </h3>
Explanation:
Several interacting forces such as Vanderwaal's forces, hydrophobic interaction and hydrogen bonds stabilize the DNA double helix structure.The strands of DNA double helix are held together by the hydrogen bond between the corresponding nucleotide bases. The separation of complimentary strands occur during replication because breaking the hydrogen bonds are comparatively easier than breaking any other bond stabilizing the DNA double helix.
Work and study hard, don't worry about anything else except for natural needs, don't study all night because it wouldn't be easier, you need your sleep too. And just try to do your best. My step mom is said something about having to go back to a school for nursing and stuff, it isn't a college, its more of a VoTech school for all kinds of things. I hope I helped
