The color of a star is primarily determined by its surface temperature.
For example, the really hot stars, called White Dwarf stars, have a white surface temperature, while a cooler star would have a more red color.
Measuring photosynthesis via the production of oxygen. Oxygen can be measured by counting bubbles evolved from pondweed, or by using the Audus apparatus to measure the amount of gas evolved over a period of time.
Correct answer: Adequate intake
It is a recommended intake value that given based on experimentally determined approximation or the estimates of the nutrients intake by a group of healthy people.
It becomes an important guide in the absence of enough scientific evidence in order to establish an estimated average requirement. Adequate intake of a nutrient is determined after a lot of observation and research.
Hence, the correct answer would be Adequate intake.
Answer: More than 90% of measles infections occurs in children under 15 years old.
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