Helicopter transport of patients was responsible for not only transport but also improved treatment of wounded soldiers due to in-flight care during the Vietnam War.
<h3>What is the
Vietnam War?</h3>
From 1 November 1955 to 30 April 1975, when Saigon fell, there was a war in Vietnam, Laos, and Cambodia. Officially, North Vietnam and South Vietnam engaged in battle during the second Indochina War. The Cold War-era proxy war is commonly regarded as taking place in North Vietnam, which was supported by the Soviet Union, China, and other communist allies, and South Vietnam, which was supported by the United States and other anti-communist friends. The United States' direct involvement ended in 1973 after a nearly 20-year duration.
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The correct answer is A. The oxygen molecule accepts electrons from a compound called cytochrome a3. Cytochromes contain a central Iron atom that can either be in the oxidised state(ferric state) Fe3+ or reduced state(ferris state) Fe2+. The cytochrome is oxidized by giving the electron to O2(O2 is reduced).O2 becomes 2O- that quickly react with H+ to form H2O.
Answer:
phylum Porifera
Explanation:
Sponges constitute the phylum Porifera, and have been defined as sessile metazoans (multicelled immobile animals) that have water intake and outlet openings connected by chambers lined with choanocytes, cells with whip-like flagella.
Different genes are activated in the blood cell than in the liver cell.
Explanation:
All the cells in the body contain the same number of genes and genetic material DNA but not all genes are expressed in a single cell.
The highly regulated process of the genes in molecular biology promotes the expression of particular gene required.
Signals from the cell environment activate the transcription factor that binds to regulatory regions of the gene, hence transcribing and making proteins for the same.
The genes for both blood cell and the liver are different but will be present in all the somatic cells, the regulatory mechanism will choose the required gene to be transcribed.
Answer:
Seeds disperse in four main ways, by air, water, animals and self propulsion:
Wind dispersal. Wind can carry seeds away from their parent plant.
Water dispersal. A few species use water to disperse their seeds.
Animal dispersal. Animals find fruits a rich source of food and as a result aid seed dispersal.
Explosion.
Explanation: