Answer:
The stages of most stars life in order are: A Protostar, Main Sequence, Red Giant B Protostar, Main Sequence, Red Dwarf C Main Sequence, Red Dwarf, Protostar D Red Giant, Main Sequence, Protostar E Nebula, Protostar, Red Dwarf. 2 What does a protostar have to do to become a star? A Nuclear fusion in its core. B Nuclear fission in its core.
Answer:
Explanation:
What occurs when the stomata close and evaporation stops is that, the tension in the xylem continues to increase until the living cells of the leaf are fully hydrated. This happens according to the cohesion-tension theory of sap ascent.
This happens at night. Transpiration stops immediately when the stomata is closed. There is a cohesion between each water molecule and adhesion between the water molecules and the stem walls; water is held in the leaves ad stems when the stomata is closed this hereby increases the tension.
Answer:
Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
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