All the options are correct.
1. New ways to preserve and transport blood for blood transfusions were discovered.
2. Blood transfusion safety was improved.
3. Scientists discovered that elements of blood could be separated by centrifuge.
4. Scientists discovered that plasma could be preserved by freezing.
Karl Landsteiner
Karl Landsteiner was the man who discovered some of the human blood types in 1900 and 1901 at the University of Vienna.
The ecosystem of the forest is formed by the interaction between the abiotic and biotic factors. Abiotic factors are the non-living factors: water, temperature,light,cloud cover, and soil. Biotic factors oh the other hand are the living organisms. Tropical rain forests<span> are hot, moist forests found near Earth's equator.</span>
Temperate rain forests are cool and dry.
Abiotic factors in temperate rain forest:
1. Temperature:The climate in the temperate rain forests is mild.
2. Water: moist and lush.
3. Light: many clouds block the sunlight.
4. Soil: nutrition rich.
Biotic factors:<span>beavers, raccoons , cougars and black bears. </span>
Abiotic factors in tropical rain forest:
1. Temperature: hot, near the Earth's equator
2. Water:60
to 160 inches of precipitation
Biotic factors: the greatest
biodiversity in the world<span>,
rubber and bamboo trees, sloths, anteaters, poison dart frogs, </span>
Answer:
Thylakoid space to the stroma
Explanation:
Electron transport chain occurs in both the mitochondria and the chloroplast which is involved in the process of ATP formation in the cell. The enzyme which catalyzes the reaction of the ATP formation is ATP synthase. The ATP synthase is composed of two subunits the CF₀ and CF₁.
The CF₁ is involved in the conversion of ADP to ATP due to the rotation of the rotor in the CF₁ unit which derives its energy from the flow of protons.
In chloroplast during the electron transport chain, the proton gets accumulated in the thylakoid lumen. These accumulated protons flow back from the thylakoid lumen towards the stroma of the chloroplast through CF₀ subunit of ATP synthase.
Thus, the selected option is correct.
Due to less food energy because biotic are that primary source
